Home / 86,515.24-129,772.62-20,851.24

Finding the Fourth Proportional to 86,515.24, 129,772.62 and 20,851.24

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Solution

The fourth proportional to 86,515.24, 129,772.62 and 20,851.24 is: 31,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,515.24 : 129,772.62 = 20,851.24 : x
  2. Step 2: Convert to fraction form
    86,515.24/129,772.62 = 20,851.24/x
  3. Step 3: Cross multiply
    86,515.24x = 129,772.62 × 20,851.24
  4. Step 4: Simplify right side
    86,515.24x = 2,705,920,045.05
  5. Step 5: Solve for x
    x = 2,705,920,045.05/86,515.24
  6. Step 6: Final answer
    x = 31,276.80

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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.