Home / 90,791.20-136,186.80-28,461.60

Finding the Fourth Proportional to 90,791.20, 136,186.80 and 28,461.60

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Solution

The fourth proportional to 90,791.20, 136,186.80 and 28,461.60 is: 42,692.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,791.20 : 136,186.80 = 28,461.60 : x
  2. Step 2: Convert to fraction form
    90,791.20/136,186.80 = 28,461.60/x
  3. Step 3: Cross multiply
    90,791.20x = 136,186.80 × 28,461.60
  4. Step 4: Simplify right side
    90,791.20x = 3,876,094,226.88
  5. Step 5: Solve for x
    x = 3,876,094,226.88/90,791.20
  6. Step 6: Final answer
    x = 42,692.40

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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.