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Finding the Fourth Proportional to 91,874.30, 137,811.45 and 80,210.30

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Solution

The fourth proportional to 91,874.30, 137,811.45 and 80,210.30 is: 120,315.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,874.30 : 137,811.45 = 80,210.30 : x
  2. Step 2: Convert to fraction form
    91,874.30/137,811.45 = 80,210.30/x
  3. Step 3: Cross multiply
    91,874.30x = 137,811.45 × 80,210.30
  4. Step 4: Simplify right side
    91,874.30x = 11,053,897,747.94
  5. Step 5: Solve for x
    x = 11,053,897,747.94/91,874.30
  6. Step 6: Final answer
    x = 120,315.45

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1.5x scale

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.