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Finding the Fourth Proportional to 172,869.47, 259,134.66 and 82,886.68

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Solution

The fourth proportional to 172,869.47, 259,134.66 and 82,886.68 is: 124,248.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,869.47 : 259,134.66 = 82,886.68 : x
  2. Step 2: Convert to fraction form
    172,869.47/259,134.66 = 82,886.68/x
  3. Step 3: Cross multiply
    172,869.47x = 259,134.66 × 82,886.68
  4. Step 4: Simplify right side
    172,869.47x = 21,478,810,344.66
  5. Step 5: Solve for x
    x = 21,478,810,344.66/172,869.47
  6. Step 6: Final answer
    x = 124,248.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.