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Finding the Fourth Proportional to 83,043.20, 124,564.80 and 64,380.80

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Solution

The fourth proportional to 83,043.20, 124,564.80 and 64,380.80 is: 96,571.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,043.20 : 124,564.80 = 64,380.80 : x
  2. Step 2: Convert to fraction form
    83,043.20/124,564.80 = 64,380.80/x
  3. Step 3: Cross multiply
    83,043.20x = 124,564.80 × 64,380.80
  4. Step 4: Simplify right side
    83,043.20x = 8,019,581,475.84
  5. Step 5: Solve for x
    x = 8,019,581,475.84/83,043.20
  6. Step 6: Final answer
    x = 96,571.20

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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.