Home / 83,612.36-115,439.10-51,815

Finding the Fourth Proportional to 83,612.36, 115,439.10 and 51,815

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Solution

The fourth proportional to 83,612.36, 115,439.10 and 51,815 is: 71,538.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,612.36 : 115,439.10 = 51,815 : x
  2. Step 2: Convert to fraction form
    83,612.36/115,439.10 = 51,815/x
  3. Step 3: Cross multiply
    83,612.36x = 115,439.10 × 51,815
  4. Step 4: Simplify right side
    83,612.36x = 5,981,476,966.50
  5. Step 5: Solve for x
    x = 5,981,476,966.50/83,612.36
  6. Step 6: Final answer
    x = 71,538.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.