Home / 129,309.65-178,444.52-74,864.12

Finding the Fourth Proportional to 129,309.65, 178,444.52 and 74,864.12

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Solution

The fourth proportional to 129,309.65, 178,444.52 and 74,864.12 is: 103,310.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,309.65 : 178,444.52 = 74,864.12 : x
  2. Step 2: Convert to fraction form
    129,309.65/178,444.52 = 74,864.12/x
  3. Step 3: Cross multiply
    129,309.65x = 178,444.52 × 74,864.12
  4. Step 4: Simplify right side
    129,309.65x = 13,359,091,066.40
  5. Step 5: Solve for x
    x = 13,359,091,066.40/129,309.65
  6. Step 6: Final answer
    x = 103,310.86

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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.