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Finding the Fourth Proportional to 354,322.92, 531,482.13 and 129,699

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Solution

The fourth proportional to 354,322.92, 531,482.13 and 129,699 is: 194,547.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,322.92 : 531,482.13 = 129,699 : x
  2. Step 2: Convert to fraction form
    354,322.92/531,482.13 = 129,699/x
  3. Step 3: Cross multiply
    354,322.92x = 531,482.13 × 129,699
  4. Step 4: Simplify right side
    354,322.92x = 68,932,700,778.87
  5. Step 5: Solve for x
    x = 68,932,700,778.87/354,322.92
  6. Step 6: Final answer
    x = 194,547.68

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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.