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Finding the Fourth Proportional to 354,535.43, 531,483.28 and 129,739.16

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Solution

The fourth proportional to 354,535.43, 531,483.28 and 129,739.16 is: 194,491.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,535.43 : 531,483.28 = 129,739.16 : x
  2. Step 2: Convert to fraction form
    354,535.43/531,483.28 = 129,739.16/x
  3. Step 3: Cross multiply
    354,535.43x = 531,483.28 × 129,739.16
  4. Step 4: Simplify right side
    354,535.43x = 68,954,195,305.61
  5. Step 5: Solve for x
    x = 68,954,195,305.61/354,535.43
  6. Step 6: Final answer
    x = 194,491.69

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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.