Home / 129,502.01-178,710.08-72,141.26

Finding the Fourth Proportional to 129,502.01, 178,710.08 and 72,141.26

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Solution

The fourth proportional to 129,502.01, 178,710.08 and 72,141.26 is: 99,553.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,502.01 : 178,710.08 = 72,141.26 : x
  2. Step 2: Convert to fraction form
    129,502.01/178,710.08 = 72,141.26/x
  3. Step 3: Cross multiply
    129,502.01x = 178,710.08 × 72,141.26
  4. Step 4: Simplify right side
    129,502.01x = 12,892,369,091.64
  5. Step 5: Solve for x
    x = 12,892,369,091.64/129,502.01
  6. Step 6: Final answer
    x = 99,553.43

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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.