Home / 121,919.20-182,522.40-86,927.20

Finding the Fourth Proportional to 121,919.20, 182,522.40 and 86,927.20

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Solution

The fourth proportional to 121,919.20, 182,522.40 and 86,927.20 is: 130,136.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,919.20 : 182,522.40 = 86,927.20 : x
  2. Step 2: Convert to fraction form
    121,919.20/182,522.40 = 86,927.20/x
  3. Step 3: Cross multiply
    121,919.20x = 182,522.40 × 86,927.20
  4. Step 4: Simplify right side
    121,919.20x = 15,866,161,169.28
  5. Step 5: Solve for x
    x = 15,866,161,169.28/121,919.20
  6. Step 6: Final answer
    x = 130,136.69

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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.