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Finding the Fourth Proportional to 83,937.20, 125,905.80 and 64,910.30

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Solution

The fourth proportional to 83,937.20, 125,905.80 and 64,910.30 is: 97,365.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,937.20 : 125,905.80 = 64,910.30 : x
  2. Step 2: Convert to fraction form
    83,937.20/125,905.80 = 64,910.30/x
  3. Step 3: Cross multiply
    83,937.20x = 125,905.80 × 64,910.30
  4. Step 4: Simplify right side
    83,937.20x = 8,172,583,249.74
  5. Step 5: Solve for x
    x = 8,172,583,249.74/83,937.20
  6. Step 6: Final answer
    x = 97,365.45

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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.