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Finding the Fourth Proportional to 132,347, 182,638.86 and 72,731

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Solution

The fourth proportional to 132,347, 182,638.86 and 72,731 is: 100,368.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,347 : 182,638.86 = 72,731 : x
  2. Step 2: Convert to fraction form
    132,347/182,638.86 = 72,731/x
  3. Step 3: Cross multiply
    132,347x = 182,638.86 × 72,731
  4. Step 4: Simplify right side
    132,347x = 13,283,506,926.66
  5. Step 5: Solve for x
    x = 13,283,506,926.66/132,347
  6. Step 6: Final answer
    x = 100,368.78

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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.