Home / 129,248.47-178,349.25-71,878.48

Finding the Fourth Proportional to 129,248.47, 178,349.25 and 71,878.48

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Solution

The fourth proportional to 129,248.47, 178,349.25 and 71,878.48 is: 99,184.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,248.47 : 178,349.25 = 71,878.48 : x
  2. Step 2: Convert to fraction form
    129,248.47/178,349.25 = 71,878.48/x
  3. Step 3: Cross multiply
    129,248.47x = 178,349.25 × 71,878.48
  4. Step 4: Simplify right side
    129,248.47x = 12,819,472,999.14
  5. Step 5: Solve for x
    x = 12,819,472,999.14/129,248.47
  6. Step 6: Final answer
    x = 99,184.72

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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.