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Finding the Fourth Proportional to 122,458.68, 169,000.56 and 81,552.66

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Solution

The fourth proportional to 122,458.68, 169,000.56 and 81,552.66 is: 112,547.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,458.68 : 169,000.56 = 81,552.66 : x
  2. Step 2: Convert to fraction form
    122,458.68/169,000.56 = 81,552.66/x
  3. Step 3: Cross multiply
    122,458.68x = 169,000.56 × 81,552.66
  4. Step 4: Simplify right side
    122,458.68x = 13,782,445,209.49
  5. Step 5: Solve for x
    x = 13,782,445,209.49/122,458.68
  6. Step 6: Final answer
    x = 112,547.72

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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.