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Finding the Fourth Proportional to 78,143.70, 107,831.88 and 44,155.14

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Solution

The fourth proportional to 78,143.70, 107,831.88 and 44,155.14 is: 60,930.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,143.70 : 107,831.88 = 44,155.14 : x
  2. Step 2: Convert to fraction form
    78,143.70/107,831.88 = 44,155.14/x
  3. Step 3: Cross multiply
    78,143.70x = 107,831.88 × 44,155.14
  4. Step 4: Simplify right side
    78,143.70x = 4,761,331,757.86
  5. Step 5: Solve for x
    x = 4,761,331,757.86/78,143.70
  6. Step 6: Final answer
    x = 60,930.46

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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.