Home / 84,876.68-127,311.78-28,721

Finding the Fourth Proportional to 84,876.68, 127,311.78 and 28,721

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Solution

The fourth proportional to 84,876.68, 127,311.78 and 28,721 is: 43,080.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,876.68 : 127,311.78 = 28,721 : x
  2. Step 2: Convert to fraction form
    84,876.68/127,311.78 = 28,721/x
  3. Step 3: Cross multiply
    84,876.68x = 127,311.78 × 28,721
  4. Step 4: Simplify right side
    84,876.68x = 3,656,521,633.38
  5. Step 5: Solve for x
    x = 3,656,521,633.38/84,876.68
  6. Step 6: Final answer
    x = 43,080.40

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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.