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Finding the Fourth Proportional to 122,359.52, 168,856.20 and 71,407.28

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Solution

The fourth proportional to 122,359.52, 168,856.20 and 71,407.28 is: 98,542.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,359.52 : 168,856.20 = 71,407.28 : x
  2. Step 2: Convert to fraction form
    122,359.52/168,856.20 = 71,407.28/x
  3. Step 3: Cross multiply
    122,359.52x = 168,856.20 × 71,407.28
  4. Step 4: Simplify right side
    122,359.52x = 12,057,561,953.14
  5. Step 5: Solve for x
    x = 12,057,561,953.14/122,359.52
  6. Step 6: Final answer
    x = 98,542.08

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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.