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Finding the Fourth Proportional to 65,987.88, 98,987.49 and 21,614.46

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Solution

The fourth proportional to 65,987.88, 98,987.49 and 21,614.46 is: 32,423.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,987.88 : 98,987.49 = 21,614.46 : x
  2. Step 2: Convert to fraction form
    65,987.88/98,987.49 = 21,614.46/x
  3. Step 3: Cross multiply
    65,987.88x = 98,987.49 × 21,614.46
  4. Step 4: Simplify right side
    65,987.88x = 2,139,561,143.11
  5. Step 5: Solve for x
    x = 2,139,561,143.11/65,987.88
  6. Step 6: Final answer
    x = 32,423.55

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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.