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Finding the Fourth Proportional to 95,712.40, 143,309.40 and 74,976.40

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Solution

The fourth proportional to 95,712.40, 143,309.40 and 74,976.40 is: 112,261.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,712.40 : 143,309.40 = 74,976.40 : x
  2. Step 2: Convert to fraction form
    95,712.40/143,309.40 = 74,976.40/x
  3. Step 3: Cross multiply
    95,712.40x = 143,309.40 × 74,976.40
  4. Step 4: Simplify right side
    95,712.40x = 10,744,822,898.16
  5. Step 5: Solve for x
    x = 10,744,822,898.16/95,712.40
  6. Step 6: Final answer
    x = 112,261.56

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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.