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Finding the Fourth Proportional to 90,743.40, 136,115.10 and 73,247.40

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Solution

The fourth proportional to 90,743.40, 136,115.10 and 73,247.40 is: 109,871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,743.40 : 136,115.10 = 73,247.40 : x
  2. Step 2: Convert to fraction form
    90,743.40/136,115.10 = 73,247.40/x
  3. Step 3: Cross multiply
    90,743.40x = 136,115.10 × 73,247.40
  4. Step 4: Simplify right side
    90,743.40x = 9,970,077,175.74
  5. Step 5: Solve for x
    x = 9,970,077,175.74/90,743.40
  6. Step 6: Final answer
    x = 109,871.10

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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.