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Finding the Fourth Proportional to 122,565.87, 169,159.19 and 74,846.88

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Solution

The fourth proportional to 122,565.87, 169,159.19 and 74,846.88 is: 103,299.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,565.87 : 169,159.19 = 74,846.88 : x
  2. Step 2: Convert to fraction form
    122,565.87/169,159.19 = 74,846.88/x
  3. Step 3: Cross multiply
    122,565.87x = 169,159.19 × 74,846.88
  4. Step 4: Simplify right side
    122,565.87x = 12,661,037,220.59
  5. Step 5: Solve for x
    x = 12,661,037,220.59/122,565.87
  6. Step 6: Final answer
    x = 103,299.86

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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.