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Finding the Fourth Proportional to 122,398.29, 168,926.45 and 68,686.47

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Solution

The fourth proportional to 122,398.29, 168,926.45 and 68,686.47 is: 94,796.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,398.29 : 168,926.45 = 68,686.47 : x
  2. Step 2: Convert to fraction form
    122,398.29/168,926.45 = 68,686.47/x
  3. Step 3: Cross multiply
    122,398.29x = 168,926.45 × 68,686.47
  4. Step 4: Simplify right side
    122,398.29x = 11,602,961,196.70
  5. Step 5: Solve for x
    x = 11,602,961,196.70/122,398.29
  6. Step 6: Final answer
    x = 94,796.76

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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.