Home / 99,980.12-149,939.88-52,569.66

Finding the Fourth Proportional to 99,980.12, 149,939.88 and 52,569.66

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Solution

The fourth proportional to 99,980.12, 149,939.88 and 52,569.66 is: 78,838.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,980.12 : 149,939.88 = 52,569.66 : x
  2. Step 2: Convert to fraction form
    99,980.12/149,939.88 = 52,569.66/x
  3. Step 3: Cross multiply
    99,980.12x = 149,939.88 × 52,569.66
  4. Step 4: Simplify right side
    99,980.12x = 7,882,288,512.04
  5. Step 5: Solve for x
    x = 7,882,288,512.04/99,980.12
  6. Step 6: Final answer
    x = 78,838.56

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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.