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Finding the Fourth Proportional to 107,118, 147,761.28 and 66,812.40

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Solution

The fourth proportional to 107,118, 147,761.28 and 66,812.40 is: 92,162.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,118 : 147,761.28 = 66,812.40 : x
  2. Step 2: Convert to fraction form
    107,118/147,761.28 = 66,812.40/x
  3. Step 3: Cross multiply
    107,118x = 147,761.28 × 66,812.40
  4. Step 4: Simplify right side
    107,118x = 9,872,285,743.87
  5. Step 5: Solve for x
    x = 9,872,285,743.87/107,118
  6. Step 6: Final answer
    x = 92,162.72

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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.