Home / 129,258.59-178,373.07-78,301.49

Finding the Fourth Proportional to 129,258.59, 178,373.07 and 78,301.49

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Solution

The fourth proportional to 129,258.59, 178,373.07 and 78,301.49 is: 108,053.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,258.59 : 178,373.07 = 78,301.49 : x
  2. Step 2: Convert to fraction form
    129,258.59/178,373.07 = 78,301.49/x
  3. Step 3: Cross multiply
    129,258.59x = 178,373.07 × 78,301.49
  4. Step 4: Simplify right side
    129,258.59x = 13,966,876,265.01
  5. Step 5: Solve for x
    x = 13,966,876,265.01/129,258.59
  6. Step 6: Final answer
    x = 108,053.76

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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.