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Finding the Fourth Proportional to 78,737.44, 108,674.64 and 45,221.92

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Solution

The fourth proportional to 78,737.44, 108,674.64 and 45,221.92 is: 62,416.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,737.44 : 108,674.64 = 45,221.92 : x
  2. Step 2: Convert to fraction form
    78,737.44/108,674.64 = 45,221.92/x
  3. Step 3: Cross multiply
    78,737.44x = 108,674.64 × 45,221.92
  4. Step 4: Simplify right side
    78,737.44x = 4,914,475,876.11
  5. Step 5: Solve for x
    x = 4,914,475,876.11/78,737.44
  6. Step 6: Final answer
    x = 62,416.00

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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.