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Finding the Fourth Proportional to 84,592.89, 126,889.43 and 25,428.56

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Solution

The fourth proportional to 84,592.89, 126,889.43 and 25,428.56 is: 38,142.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,592.89 : 126,889.43 = 25,428.56 : x
  2. Step 2: Convert to fraction form
    84,592.89/126,889.43 = 25,428.56/x
  3. Step 3: Cross multiply
    84,592.89x = 126,889.43 × 25,428.56
  4. Step 4: Simplify right side
    84,592.89x = 3,226,615,484.12
  5. Step 5: Solve for x
    x = 3,226,615,484.12/84,592.89
  6. Step 6: Final answer
    x = 38,142.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.