Home / 80,726.70-121,085.13-30,115.98

Finding the Fourth Proportional to 80,726.70, 121,085.13 and 30,115.98

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Solution

The fourth proportional to 80,726.70, 121,085.13 and 30,115.98 is: 45,172.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,726.70 : 121,085.13 = 30,115.98 : x
  2. Step 2: Convert to fraction form
    80,726.70/121,085.13 = 30,115.98/x
  3. Step 3: Cross multiply
    80,726.70x = 121,085.13 × 30,115.98
  4. Step 4: Simplify right side
    80,726.70x = 3,646,597,353.38
  5. Step 5: Solve for x
    x = 3,646,597,353.38/80,726.70
  6. Step 6: Final answer
    x = 45,172.13

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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.