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Finding the Fourth Proportional to 92,672.64, 138,905.28 and 40,003.20

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Solution

The fourth proportional to 92,672.64, 138,905.28 and 40,003.20 is: 59,960.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,672.64 : 138,905.28 = 40,003.20 : x
  2. Step 2: Convert to fraction form
    92,672.64/138,905.28 = 40,003.20/x
  3. Step 3: Cross multiply
    92,672.64x = 138,905.28 × 40,003.20
  4. Step 4: Simplify right side
    92,672.64x = 5,556,655,696.90
  5. Step 5: Solve for x
    x = 5,556,655,696.90/92,672.64
  6. Step 6: Final answer
    x = 59,960.05

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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.