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Finding the Fourth Proportional to 78,575.28, 108,432.76 and 43,247.28

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Solution

The fourth proportional to 78,575.28, 108,432.76 and 43,247.28 is: 59,680.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,575.28 : 108,432.76 = 43,247.28 : x
  2. Step 2: Convert to fraction form
    78,575.28/108,432.76 = 43,247.28/x
  3. Step 3: Cross multiply
    78,575.28x = 108,432.76 × 43,247.28
  4. Step 4: Simplify right side
    78,575.28x = 4,689,421,932.89
  5. Step 5: Solve for x
    x = 4,689,421,932.89/78,575.28
  6. Step 6: Final answer
    x = 59,680.63

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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.