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Finding the Fourth Proportional to 100,575.34, 138,774.67 and 68,335.52

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Solution

The fourth proportional to 100,575.34, 138,774.67 and 68,335.52 is: 94,289.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,575.34 : 138,774.67 = 68,335.52 : x
  2. Step 2: Convert to fraction form
    100,575.34/138,774.67 = 68,335.52/x
  3. Step 3: Cross multiply
    100,575.34x = 138,774.67 × 68,335.52
  4. Step 4: Simplify right side
    100,575.34x = 9,483,238,372.57
  5. Step 5: Solve for x
    x = 9,483,238,372.57/100,575.34
  6. Step 6: Final answer
    x = 94,289.90

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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.