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Finding the Fourth Proportional to 108,471.78, 162,646.76 and 74,316.11

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Solution

The fourth proportional to 108,471.78, 162,646.76 and 74,316.11 is: 111,432.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,471.78 : 162,646.76 = 74,316.11 : x
  2. Step 2: Convert to fraction form
    108,471.78/162,646.76 = 74,316.11/x
  3. Step 3: Cross multiply
    108,471.78x = 162,646.76 × 74,316.11
  4. Step 4: Simplify right side
    108,471.78x = 12,087,274,128.29
  5. Step 5: Solve for x
    x = 12,087,274,128.29/108,471.78
  6. Step 6: Final answer
    x = 111,432.43

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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.