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Finding the Fourth Proportional to 78,761.76, 108,711.90 and 44,790.10

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Solution

The fourth proportional to 78,761.76, 108,711.90 and 44,790.10 is: 61,822.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,761.76 : 108,711.90 = 44,790.10 : x
  2. Step 2: Convert to fraction form
    78,761.76/108,711.90 = 44,790.10/x
  3. Step 3: Cross multiply
    78,761.76x = 108,711.90 × 44,790.10
  4. Step 4: Simplify right side
    78,761.76x = 4,869,216,872.19
  5. Step 5: Solve for x
    x = 4,869,216,872.19/78,761.76
  6. Step 6: Final answer
    x = 61,822.09

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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.