Home / 100,290.24-138,402.05-54,967.86

Finding the Fourth Proportional to 100,290.24, 138,402.05 and 54,967.86

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Solution

The fourth proportional to 100,290.24, 138,402.05 and 54,967.86 is: 75,856.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,290.24 : 138,402.05 = 54,967.86 : x
  2. Step 2: Convert to fraction form
    100,290.24/138,402.05 = 54,967.86/x
  3. Step 3: Cross multiply
    100,290.24x = 138,402.05 × 54,967.86
  4. Step 4: Simplify right side
    100,290.24x = 7,607,664,233.27
  5. Step 5: Solve for x
    x = 7,607,664,233.27/100,290.24
  6. Step 6: Final answer
    x = 75,856.48

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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.