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Finding the Fourth Proportional to 75,287.60, 112,931.40 and 40,209.20

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Solution

The fourth proportional to 75,287.60, 112,931.40 and 40,209.20 is: 60,313.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,287.60 : 112,931.40 = 40,209.20 : x
  2. Step 2: Convert to fraction form
    75,287.60/112,931.40 = 40,209.20/x
  3. Step 3: Cross multiply
    75,287.60x = 112,931.40 × 40,209.20
  4. Step 4: Simplify right side
    75,287.60x = 4,540,881,248.88
  5. Step 5: Solve for x
    x = 4,540,881,248.88/75,287.60
  6. Step 6: Final answer
    x = 60,313.80

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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.