Home / 84,416.15-126,649.17-39,981.78

Finding the Fourth Proportional to 84,416.15, 126,649.17 and 39,981.78

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Solution

The fourth proportional to 84,416.15, 126,649.17 and 39,981.78 is: 59,984.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,416.15 : 126,649.17 = 39,981.78 : x
  2. Step 2: Convert to fraction form
    84,416.15/126,649.17 = 39,981.78/x
  3. Step 3: Cross multiply
    84,416.15x = 126,649.17 × 39,981.78
  4. Step 4: Simplify right side
    84,416.15x = 5,063,658,895.92
  5. Step 5: Solve for x
    x = 5,063,658,895.92/84,416.15
  6. Step 6: Final answer
    x = 59,984.48

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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.