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Finding the Fourth Proportional to 81,259.88, 112,144.50 and 45,461.42

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Solution

The fourth proportional to 81,259.88, 112,144.50 and 45,461.42 is: 62,740.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,259.88 : 112,144.50 = 45,461.42 : x
  2. Step 2: Convert to fraction form
    81,259.88/112,144.50 = 45,461.42/x
  3. Step 3: Cross multiply
    81,259.88x = 112,144.50 × 45,461.42
  4. Step 4: Simplify right side
    81,259.88x = 5,098,247,427.16
  5. Step 5: Solve for x
    x = 5,098,247,427.16/81,259.88
  6. Step 6: Final answer
    x = 62,740.03

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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.