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Finding the Fourth Proportional to 78,560.93, 108,414.44 and 42,750.70

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Solution

The fourth proportional to 78,560.93, 108,414.44 and 42,750.70 is: 58,996.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,560.93 : 108,414.44 = 42,750.70 : x
  2. Step 2: Convert to fraction form
    78,560.93/108,414.44 = 42,750.70/x
  3. Step 3: Cross multiply
    78,560.93x = 108,414.44 × 42,750.70
  4. Step 4: Simplify right side
    78,560.93x = 4,634,793,200.11
  5. Step 5: Solve for x
    x = 4,634,793,200.11/78,560.93
  6. Step 6: Final answer
    x = 58,996.16

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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.