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Finding the Fourth Proportional to 78,251.46, 107,989.46 and 44,259.28

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Solution

The fourth proportional to 78,251.46, 107,989.46 and 44,259.28 is: 61,079.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,251.46 : 107,989.46 = 44,259.28 : x
  2. Step 2: Convert to fraction form
    78,251.46/107,989.46 = 44,259.28/x
  3. Step 3: Cross multiply
    78,251.46x = 107,989.46 × 44,259.28
  4. Step 4: Simplify right side
    78,251.46x = 4,779,535,255.92
  5. Step 5: Solve for x
    x = 4,779,535,255.92/78,251.46
  6. Step 6: Final answer
    x = 61,079.18

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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.