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Finding the Fourth Proportional to 124,180.78, 171,373.15 and 87,947.05

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Solution

The fourth proportional to 124,180.78, 171,373.15 and 87,947.05 is: 121,369.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,180.78 : 171,373.15 = 87,947.05 : x
  2. Step 2: Convert to fraction form
    124,180.78/171,373.15 = 87,947.05/x
  3. Step 3: Cross multiply
    124,180.78x = 171,373.15 × 87,947.05
  4. Step 4: Simplify right side
    124,180.78x = 15,071,762,551.97
  5. Step 5: Solve for x
    x = 15,071,762,551.97/124,180.78
  6. Step 6: Final answer
    x = 121,369.53

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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.