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Finding the Fourth Proportional to 89,991.90, 124,204.68 and 51,748.38

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Solution

The fourth proportional to 89,991.90, 124,204.68 and 51,748.38 is: 71,421.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,991.90 : 124,204.68 = 51,748.38 : x
  2. Step 2: Convert to fraction form
    89,991.90/124,204.68 = 51,748.38/x
  3. Step 3: Cross multiply
    89,991.90x = 124,204.68 × 51,748.38
  4. Step 4: Simplify right side
    89,991.90x = 6,427,390,978.42
  5. Step 5: Solve for x
    x = 6,427,390,978.42/89,991.90
  6. Step 6: Final answer
    x = 71,421.88

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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.