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Finding the Fourth Proportional to 92,697.18, 138,938.67 and 42,672.39

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Solution

The fourth proportional to 92,697.18, 138,938.67 and 42,672.39 is: 63,959.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,697.18 : 138,938.67 = 42,672.39 : x
  2. Step 2: Convert to fraction form
    92,697.18/138,938.67 = 42,672.39/x
  3. Step 3: Cross multiply
    92,697.18x = 138,938.67 × 42,672.39
  4. Step 4: Simplify right side
    92,697.18x = 5,928,845,112.32
  5. Step 5: Solve for x
    x = 5,928,845,112.32/92,697.18
  6. Step 6: Final answer
    x = 63,959.28

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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.