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Finding the Fourth Proportional to 99,805.55, 149,708.33 and 79,721.01

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Solution

The fourth proportional to 99,805.55, 149,708.33 and 79,721.01 is: 119,581.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,805.55 : 149,708.33 = 79,721.01 : x
  2. Step 2: Convert to fraction form
    99,805.55/149,708.33 = 79,721.01/x
  3. Step 3: Cross multiply
    99,805.55x = 149,708.33 × 79,721.01
  4. Step 4: Simplify right side
    99,805.55x = 11,934,898,524.47
  5. Step 5: Solve for x
    x = 11,934,898,524.47/99,805.55
  6. Step 6: Final answer
    x = 119,581.51

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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.