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Finding the Fourth Proportional to 122,771.58, 169,426.53 and 72,470.58

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Solution

The fourth proportional to 122,771.58, 169,426.53 and 72,470.58 is: 100,010.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,771.58 : 169,426.53 = 72,470.58 : x
  2. Step 2: Convert to fraction form
    122,771.58/169,426.53 = 72,470.58/x
  3. Step 3: Cross multiply
    122,771.58x = 169,426.53 × 72,470.58
  4. Step 4: Simplify right side
    122,771.58x = 12,278,438,896.49
  5. Step 5: Solve for x
    x = 12,278,438,896.49/122,771.58
  6. Step 6: Final answer
    x = 100,010.43

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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.