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Finding the Fourth Proportional to 134,708.60, 202,281.60 and 90,531.20

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Solution

The fourth proportional to 134,708.60, 202,281.60 and 90,531.20 is: 135,943.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,708.60 : 202,281.60 = 90,531.20 : x
  2. Step 2: Convert to fraction form
    134,708.60/202,281.60 = 90,531.20/x
  3. Step 3: Cross multiply
    134,708.60x = 202,281.60 × 90,531.20
  4. Step 4: Simplify right side
    134,708.60x = 18,312,795,985.92
  5. Step 5: Solve for x
    x = 18,312,795,985.92/134,708.60
  6. Step 6: Final answer
    x = 135,943.78

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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.