Home / 129,547.91-178,694.35-89,191.61

Finding the Fourth Proportional to 129,547.91, 178,694.35 and 89,191.61

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Solution

The fourth proportional to 129,547.91, 178,694.35 and 89,191.61 is: 123,028.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,547.91 : 178,694.35 = 89,191.61 : x
  2. Step 2: Convert to fraction form
    129,547.91/178,694.35 = 89,191.61/x
  3. Step 3: Cross multiply
    129,547.91x = 178,694.35 × 89,191.61
  4. Step 4: Simplify right side
    129,547.91x = 15,938,036,328.06
  5. Step 5: Solve for x
    x = 15,938,036,328.06/129,547.91
  6. Step 6: Final answer
    x = 123,028.12

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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.