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Finding the Fourth Proportional to 171,248.89, 256,868.01 and 81,356.30

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Solution

The fourth proportional to 171,248.89, 256,868.01 and 81,356.30 is: 122,031.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,248.89 : 256,868.01 = 81,356.30 : x
  2. Step 2: Convert to fraction form
    171,248.89/256,868.01 = 81,356.30/x
  3. Step 3: Cross multiply
    171,248.89x = 256,868.01 × 81,356.30
  4. Step 4: Simplify right side
    171,248.89x = 20,897,830,881.96
  5. Step 5: Solve for x
    x = 20,897,830,881.96/171,248.89
  6. Step 6: Final answer
    x = 122,031.92

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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.