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Finding the Fourth Proportional to 84,015.80, 126,023.70 and 83,432.60

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Solution

The fourth proportional to 84,015.80, 126,023.70 and 83,432.60 is: 125,148.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,015.80 : 126,023.70 = 83,432.60 : x
  2. Step 2: Convert to fraction form
    84,015.80/126,023.70 = 83,432.60/x
  3. Step 3: Cross multiply
    84,015.80x = 126,023.70 × 83,432.60
  4. Step 4: Simplify right side
    84,015.80x = 10,514,484,952.62
  5. Step 5: Solve for x
    x = 10,514,484,952.62/84,015.80
  6. Step 6: Final answer
    x = 125,148.90

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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.