Home / 86,539.24-129,809.90-30,380.76

Finding the Fourth Proportional to 86,539.24, 129,809.90 and 30,380.76

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Solution

The fourth proportional to 86,539.24, 129,809.90 and 30,380.76 is: 45,571.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,539.24 : 129,809.90 = 30,380.76 : x
  2. Step 2: Convert to fraction form
    86,539.24/129,809.90 = 30,380.76/x
  3. Step 3: Cross multiply
    86,539.24x = 129,809.90 × 30,380.76
  4. Step 4: Simplify right side
    86,539.24x = 3,943,723,417.52
  5. Step 5: Solve for x
    x = 3,943,723,417.52/86,539.24
  6. Step 6: Final answer
    x = 45,571.51

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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.