Home / 83,987.70-125,981.55-79,905.30

Finding the Fourth Proportional to 83,987.70, 125,981.55 and 79,905.30

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Solution

The fourth proportional to 83,987.70, 125,981.55 and 79,905.30 is: 119,857.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,987.70 : 125,981.55 = 79,905.30 : x
  2. Step 2: Convert to fraction form
    83,987.70/125,981.55 = 79,905.30/x
  3. Step 3: Cross multiply
    83,987.70x = 125,981.55 × 79,905.30
  4. Step 4: Simplify right side
    83,987.70x = 10,066,593,547.22
  5. Step 5: Solve for x
    x = 10,066,593,547.22/83,987.70
  6. Step 6: Final answer
    x = 119,857.95

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Similar ratio
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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.