Home / 90,835.20-136,252.80-28,505.60

Finding the Fourth Proportional to 90,835.20, 136,252.80 and 28,505.60

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Solution

The fourth proportional to 90,835.20, 136,252.80 and 28,505.60 is: 42,758.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,835.20 : 136,252.80 = 28,505.60 : x
  2. Step 2: Convert to fraction form
    90,835.20/136,252.80 = 28,505.60/x
  3. Step 3: Cross multiply
    90,835.20x = 136,252.80 × 28,505.60
  4. Step 4: Simplify right side
    90,835.20x = 3,883,967,815.68
  5. Step 5: Solve for x
    x = 3,883,967,815.68/90,835.20
  6. Step 6: Final answer
    x = 42,758.40

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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.