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Finding the Fourth Proportional to 122,909.68, 169,575.96 and 72,598.96

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Solution

The fourth proportional to 122,909.68, 169,575.96 and 72,598.96 is: 100,163.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,909.68 : 169,575.96 = 72,598.96 : x
  2. Step 2: Convert to fraction form
    122,909.68/169,575.96 = 72,598.96/x
  3. Step 3: Cross multiply
    122,909.68x = 169,575.96 × 72,598.96
  4. Step 4: Simplify right side
    122,909.68x = 12,311,038,337.00
  5. Step 5: Solve for x
    x = 12,311,038,337.00/122,909.68
  6. Step 6: Final answer
    x = 100,163.29

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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.