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Finding the Fourth Proportional to 78,331.78, 108,103.17 and 44,340.40

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Solution

The fourth proportional to 78,331.78, 108,103.17 and 44,340.40 is: 61,192.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,331.78 : 108,103.17 = 44,340.40 : x
  2. Step 2: Convert to fraction form
    78,331.78/108,103.17 = 44,340.40/x
  3. Step 3: Cross multiply
    78,331.78x = 108,103.17 × 44,340.40
  4. Step 4: Simplify right side
    78,331.78x = 4,793,337,799.07
  5. Step 5: Solve for x
    x = 4,793,337,799.07/78,331.78
  6. Step 6: Final answer
    x = 61,192.76

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1.5x scale

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.