Home / 129,044.16-178,095.28-75,342.40

Finding the Fourth Proportional to 129,044.16, 178,095.28 and 75,342.40

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Solution

The fourth proportional to 129,044.16, 178,095.28 and 75,342.40 is: 103,980.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,044.16 : 178,095.28 = 75,342.40 : x
  2. Step 2: Convert to fraction form
    129,044.16/178,095.28 = 75,342.40/x
  3. Step 3: Cross multiply
    129,044.16x = 178,095.28 × 75,342.40
  4. Step 4: Simplify right side
    129,044.16x = 13,418,125,823.87
  5. Step 5: Solve for x
    x = 13,418,125,823.87/129,044.16
  6. Step 6: Final answer
    x = 103,980.88

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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.