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Finding the Fourth Proportional to 84,147.58, 126,222.48 and 27,987.70

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Solution

The fourth proportional to 84,147.58, 126,222.48 and 27,987.70 is: 41,981.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,147.58 : 126,222.48 = 27,987.70 : x
  2. Step 2: Convert to fraction form
    84,147.58/126,222.48 = 27,987.70/x
  3. Step 3: Cross multiply
    84,147.58x = 126,222.48 × 27,987.70
  4. Step 4: Simplify right side
    84,147.58x = 3,532,676,903.50
  5. Step 5: Solve for x
    x = 3,532,676,903.50/84,147.58
  6. Step 6: Final answer
    x = 41,981.92

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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.