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Finding the Fourth Proportional to 100,367.32, 138,508.67 and 55,044.90

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Solution

The fourth proportional to 100,367.32, 138,508.67 and 55,044.90 is: 75,962.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,367.32 : 138,508.67 = 55,044.90 : x
  2. Step 2: Convert to fraction form
    100,367.32/138,508.67 = 55,044.90/x
  3. Step 3: Cross multiply
    100,367.32x = 138,508.67 × 55,044.90
  4. Step 4: Simplify right side
    100,367.32x = 7,624,195,889.28
  5. Step 5: Solve for x
    x = 7,624,195,889.28/100,367.32
  6. Step 6: Final answer
    x = 75,962.93

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1.5x scale

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.