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Finding the Fourth Proportional to 65,707.89, 98,631.98 and 28,286.49

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Solution

The fourth proportional to 65,707.89, 98,631.98 and 28,286.49 is: 42,459.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,707.89 : 98,631.98 = 28,286.49 : x
  2. Step 2: Convert to fraction form
    65,707.89/98,631.98 = 28,286.49/x
  3. Step 3: Cross multiply
    65,707.89x = 98,631.98 × 28,286.49
  4. Step 4: Simplify right side
    65,707.89x = 2,789,952,374.52
  5. Step 5: Solve for x
    x = 2,789,952,374.52/65,707.89
  6. Step 6: Final answer
    x = 42,459.93

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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.