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Finding the Fourth Proportional to 79,657.80, 119,459.92 and 40,189.72

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Solution

The fourth proportional to 79,657.80, 119,459.92 and 40,189.72 is: 60,271.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,657.80 : 119,459.92 = 40,189.72 : x
  2. Step 2: Convert to fraction form
    79,657.80/119,459.92 = 40,189.72/x
  3. Step 3: Cross multiply
    79,657.80x = 119,459.92 × 40,189.72
  4. Step 4: Simplify right side
    79,657.80x = 4,801,060,736.02
  5. Step 5: Solve for x
    x = 4,801,060,736.02/79,657.80
  6. Step 6: Final answer
    x = 60,271.07

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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.