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Finding the Fourth Proportional to 78,659.80, 108,543.90 and 44,661.40

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Solution

The fourth proportional to 78,659.80, 108,543.90 and 44,661.40 is: 61,628.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,659.80 : 108,543.90 = 44,661.40 : x
  2. Step 2: Convert to fraction form
    78,659.80/108,543.90 = 44,661.40/x
  3. Step 3: Cross multiply
    78,659.80x = 108,543.90 × 44,661.40
  4. Step 4: Simplify right side
    78,659.80x = 4,847,722,535.46
  5. Step 5: Solve for x
    x = 4,847,722,535.46/78,659.80
  6. Step 6: Final answer
    x = 61,628.97

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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.