Home / 86,691.28-130,074.48-30,571.49

Finding the Fourth Proportional to 86,691.28, 130,074.48 and 30,571.49

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Solution

The fourth proportional to 86,691.28, 130,074.48 and 30,571.49 is: 45,870.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,691.28 : 130,074.48 = 30,571.49 : x
  2. Step 2: Convert to fraction form
    86,691.28/130,074.48 = 30,571.49/x
  3. Step 3: Cross multiply
    86,691.28x = 130,074.48 × 30,571.49
  4. Step 4: Simplify right side
    86,691.28x = 3,976,570,014.20
  5. Step 5: Solve for x
    x = 3,976,570,014.20/86,691.28
  6. Step 6: Final answer
    x = 45,870.47

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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.