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Finding the Fourth Proportional to 84,376.60, 126,564.90 and 82,408.30

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Solution

The fourth proportional to 84,376.60, 126,564.90 and 82,408.30 is: 123,612.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,376.60 : 126,564.90 = 82,408.30 : x
  2. Step 2: Convert to fraction form
    84,376.60/126,564.90 = 82,408.30/x
  3. Step 3: Cross multiply
    84,376.60x = 126,564.90 × 82,408.30
  4. Step 4: Simplify right side
    84,376.60x = 10,429,998,248.67
  5. Step 5: Solve for x
    x = 10,429,998,248.67/84,376.60
  6. Step 6: Final answer
    x = 123,612.45

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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.