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Finding the Fourth Proportional to 354,187.67, 531,140.55 and 129,496.91

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Solution

The fourth proportional to 354,187.67, 531,140.55 and 129,496.91 is: 194,193.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,187.67 : 531,140.55 = 129,496.91 : x
  2. Step 2: Convert to fraction form
    354,187.67/531,140.55 = 129,496.91/x
  3. Step 3: Cross multiply
    354,187.67x = 531,140.55 × 129,496.91
  4. Step 4: Simplify right side
    354,187.67x = 68,781,057,345.00
  5. Step 5: Solve for x
    x = 68,781,057,345.00/354,187.67
  6. Step 6: Final answer
    x = 194,193.82

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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.