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Finding the Fourth Proportional to 121,945.52, 168,264.60 and 71,654.24

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Solution

The fourth proportional to 121,945.52, 168,264.60 and 71,654.24 is: 98,870.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,945.52 : 168,264.60 = 71,654.24 : x
  2. Step 2: Convert to fraction form
    121,945.52/168,264.60 = 71,654.24/x
  3. Step 3: Cross multiply
    121,945.52x = 168,264.60 × 71,654.24
  4. Step 4: Simplify right side
    121,945.52x = 12,056,872,031.90
  5. Step 5: Solve for x
    x = 12,056,872,031.90/121,945.52
  6. Step 6: Final answer
    x = 98,870.97

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1.5x scale

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.