Home / 86,625.13-129,937.69-20,961.13

Finding the Fourth Proportional to 86,625.13, 129,937.69 and 20,961.13

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Solution

The fourth proportional to 86,625.13, 129,937.69 and 20,961.13 is: 31,441.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,625.13 : 129,937.69 = 20,961.13 : x
  2. Step 2: Convert to fraction form
    86,625.13/129,937.69 = 20,961.13/x
  3. Step 3: Cross multiply
    86,625.13x = 129,937.69 × 20,961.13
  4. Step 4: Simplify right side
    86,625.13x = 2,723,640,811.99
  5. Step 5: Solve for x
    x = 2,723,640,811.99/86,625.13
  6. Step 6: Final answer
    x = 31,441.69

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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.