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Finding the Fourth Proportional to 99,104.70, 148,679.74 and 42,954.20

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Solution

The fourth proportional to 99,104.70, 148,679.74 and 42,954.20 is: 64,441.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,104.70 : 148,679.74 = 42,954.20 : x
  2. Step 2: Convert to fraction form
    99,104.70/148,679.74 = 42,954.20/x
  3. Step 3: Cross multiply
    99,104.70x = 148,679.74 × 42,954.20
  4. Step 4: Simplify right side
    99,104.70x = 6,386,419,287.91
  5. Step 5: Solve for x
    x = 6,386,419,287.91/99,104.70
  6. Step 6: Final answer
    x = 64,441.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.