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Finding the Fourth Proportional to 84,317.70, 126,476.55 and 21,988.20

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Solution

The fourth proportional to 84,317.70, 126,476.55 and 21,988.20 is: 32,982.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,317.70 : 126,476.55 = 21,988.20 : x
  2. Step 2: Convert to fraction form
    84,317.70/126,476.55 = 21,988.20/x
  3. Step 3: Cross multiply
    84,317.70x = 126,476.55 × 21,988.20
  4. Step 4: Simplify right side
    84,317.70x = 2,780,991,676.71
  5. Step 5: Solve for x
    x = 2,780,991,676.71/84,317.70
  6. Step 6: Final answer
    x = 32,982.30

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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.