Home / 129,175.89-178,265.79-71,816.96

Finding the Fourth Proportional to 129,175.89, 178,265.79 and 71,816.96

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Solution

The fourth proportional to 129,175.89, 178,265.79 and 71,816.96 is: 99,109.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,175.89 : 178,265.79 = 71,816.96 : x
  2. Step 2: Convert to fraction form
    129,175.89/178,265.79 = 71,816.96/x
  3. Step 3: Cross multiply
    129,175.89x = 178,265.79 × 71,816.96
  4. Step 4: Simplify right side
    129,175.89x = 12,802,506,218.47
  5. Step 5: Solve for x
    x = 12,802,506,218.47/129,175.89
  6. Step 6: Final answer
    x = 99,109.10

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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.