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Finding the Fourth Proportional to 100,324.92, 138,452.90 and 57,308.20

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Solution

The fourth proportional to 100,324.92, 138,452.90 and 57,308.20 is: 79,087.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,324.92 : 138,452.90 = 57,308.20 : x
  2. Step 2: Convert to fraction form
    100,324.92/138,452.90 = 57,308.20/x
  3. Step 3: Cross multiply
    100,324.92x = 138,452.90 × 57,308.20
  4. Step 4: Simplify right side
    100,324.92x = 7,934,486,483.78
  5. Step 5: Solve for x
    x = 7,934,486,483.78/100,324.92
  6. Step 6: Final answer
    x = 79,087.89

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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.