Home / 84,149.74-116,165.30-72,618.78

Finding the Fourth Proportional to 84,149.74, 116,165.30 and 72,618.78

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Solution

The fourth proportional to 84,149.74, 116,165.30 and 72,618.78 is: 100,247.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,149.74 : 116,165.30 = 72,618.78 : x
  2. Step 2: Convert to fraction form
    84,149.74/116,165.30 = 72,618.78/x
  3. Step 3: Cross multiply
    84,149.74x = 116,165.30 × 72,618.78
  4. Step 4: Simplify right side
    84,149.74x = 8,435,782,001.24
  5. Step 5: Solve for x
    x = 8,435,782,001.24/84,149.74
  6. Step 6: Final answer
    x = 100,247.28

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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.