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Finding the Fourth Proportional to 122,695.44, 169,308 and 71,720.10

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Solution

The fourth proportional to 122,695.44, 169,308 and 71,720.10 is: 98,966.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,695.44 : 169,308 = 71,720.10 : x
  2. Step 2: Convert to fraction form
    122,695.44/169,308 = 71,720.10/x
  3. Step 3: Cross multiply
    122,695.44x = 169,308 × 71,720.10
  4. Step 4: Simplify right side
    122,695.44x = 12,142,786,690.80
  5. Step 5: Solve for x
    x = 12,142,786,690.80/122,695.44
  6. Step 6: Final answer
    x = 98,966.89

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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.