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Finding the Fourth Proportional to 65,042.80, 97,379.72 and 42,579.68

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Solution

The fourth proportional to 65,042.80, 97,379.72 and 42,579.68 is: 63,748.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,042.80 : 97,379.72 = 42,579.68 : x
  2. Step 2: Convert to fraction form
    65,042.80/97,379.72 = 42,579.68/x
  3. Step 3: Cross multiply
    65,042.80x = 97,379.72 × 42,579.68
  4. Step 4: Simplify right side
    65,042.80x = 4,146,396,775.97
  5. Step 5: Solve for x
    x = 4,146,396,775.97/65,042.80
  6. Step 6: Final answer
    x = 63,748.75

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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.