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Finding the Fourth Proportional to 89,722.40, 134,468.40 and 68,842.40

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Solution

The fourth proportional to 89,722.40, 134,468.40 and 68,842.40 is: 103,175.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,722.40 : 134,468.40 = 68,842.40 : x
  2. Step 2: Convert to fraction form
    89,722.40/134,468.40 = 68,842.40/x
  3. Step 3: Cross multiply
    89,722.40x = 134,468.40 × 68,842.40
  4. Step 4: Simplify right side
    89,722.40x = 9,257,127,380.16
  5. Step 5: Solve for x
    x = 9,257,127,380.16/89,722.40
  6. Step 6: Final answer
    x = 103,175.21

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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.