Home / 129,497.10-178,705.35-72,908.88

Finding the Fourth Proportional to 129,497.10, 178,705.35 and 72,908.88

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Solution

The fourth proportional to 129,497.10, 178,705.35 and 72,908.88 is: 100,613.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,497.10 : 178,705.35 = 72,908.88 : x
  2. Step 2: Convert to fraction form
    129,497.10/178,705.35 = 72,908.88/x
  3. Step 3: Cross multiply
    129,497.10x = 178,705.35 × 72,908.88
  4. Step 4: Simplify right side
    129,497.10x = 13,029,206,918.51
  5. Step 5: Solve for x
    x = 13,029,206,918.51/129,497.10
  6. Step 6: Final answer
    x = 100,613.89

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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.