Home / 129,931.43-179,318.00-78,933.02

Finding the Fourth Proportional to 129,931.43, 179,318.00 and 78,933.02

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Solution

The fourth proportional to 129,931.43, 179,318.00 and 78,933.02 is: 108,935.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,931.43 : 179,318.00 = 78,933.02 : x
  2. Step 2: Convert to fraction form
    129,931.43/179,318.00 = 78,933.02/x
  3. Step 3: Cross multiply
    129,931.43x = 179,318.00 × 78,933.02
  4. Step 4: Simplify right side
    129,931.43x = 14,154,110,581.10
  5. Step 5: Solve for x
    x = 14,154,110,581.10/129,931.43
  6. Step 6: Final answer
    x = 108,935.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.