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Finding the Fourth Proportional to 129,374.48, 178,618.81 and 88,606.97

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Solution

The fourth proportional to 129,374.48, 178,618.81 and 88,606.97 is: 122,333.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,374.48 : 178,618.81 = 88,606.97 : x
  2. Step 2: Convert to fraction form
    129,374.48/178,618.81 = 88,606.97/x
  3. Step 3: Cross multiply
    129,374.48x = 178,618.81 × 88,606.97
  4. Step 4: Simplify right side
    129,374.48x = 15,826,871,539.11
  5. Step 5: Solve for x
    x = 15,826,871,539.11/129,374.48
  6. Step 6: Final answer
    x = 122,333.80

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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.