Home / 100,861.12-139,187.10-55,538.14

Finding the Fourth Proportional to 100,861.12, 139,187.10 and 55,538.14

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Solution

The fourth proportional to 100,861.12, 139,187.10 and 55,538.14 is: 76,641.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,861.12 : 139,187.10 = 55,538.14 : x
  2. Step 2: Convert to fraction form
    100,861.12/139,187.10 = 55,538.14/x
  3. Step 3: Cross multiply
    100,861.12x = 139,187.10 × 55,538.14
  4. Step 4: Simplify right side
    100,861.12x = 7,730,192,645.99
  5. Step 5: Solve for x
    x = 7,730,192,645.99/100,861.12
  6. Step 6: Final answer
    x = 76,641.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.