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Finding the Fourth Proportional to 106,572.60, 146,979.90 and 64,123.20

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Solution

The fourth proportional to 106,572.60, 146,979.90 and 64,123.20 is: 88,435.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,572.60 : 146,979.90 = 64,123.20 : x
  2. Step 2: Convert to fraction form
    106,572.60/146,979.90 = 64,123.20/x
  3. Step 3: Cross multiply
    106,572.60x = 146,979.90 × 64,123.20
  4. Step 4: Simplify right side
    106,572.60x = 9,424,821,523.68
  5. Step 5: Solve for x
    x = 9,424,821,523.68/106,572.60
  6. Step 6: Final answer
    x = 88,435.69

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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.