Home / 90,990,156.80-136,485,235.20-90,423,286.40

Finding the Fourth Proportional to 90,990,156.80, 136,485,235.20 and 90,423,286.40

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Solution

The fourth proportional to 90,990,156.80, 136,485,235.20 and 90,423,286.40 is: 135,634,929.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,990,156.80 : 136,485,235.20 = 90,423,286.40 : x
  2. Step 2: Convert to fraction form
    90,990,156.80/136,485,235.20 = 90,423,286.40/x
  3. Step 3: Cross multiply
    90,990,156.80x = 136,485,235.20 × 90,423,286.40
  4. Step 4: Simplify right side
    90,990,156.80x = 12,341,443,511,860,962
  5. Step 5: Solve for x
    x = 12,341,443,511,860,962/90,990,156.80
  6. Step 6: Final answer
    x = 135,634,929.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.