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Finding the Fourth Proportional to 122,555.91, 169,100.92 and 71,545.50

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Solution

The fourth proportional to 122,555.91, 169,100.92 and 71,545.50 is: 98,717.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,555.91 : 169,100.92 = 71,545.50 : x
  2. Step 2: Convert to fraction form
    122,555.91/169,100.92 = 71,545.50/x
  3. Step 3: Cross multiply
    122,555.91x = 169,100.92 × 71,545.50
  4. Step 4: Simplify right side
    122,555.91x = 12,098,409,871.86
  5. Step 5: Solve for x
    x = 12,098,409,871.86/122,555.91
  6. Step 6: Final answer
    x = 98,717.47

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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.