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Finding the Fourth Proportional to 83,220.64, 124,825.20 and 30,620.32

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Solution

The fourth proportional to 83,220.64, 124,825.20 and 30,620.32 is: 45,928.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,220.64 : 124,825.20 = 30,620.32 : x
  2. Step 2: Convert to fraction form
    83,220.64/124,825.20 = 30,620.32/x
  3. Step 3: Cross multiply
    83,220.64x = 124,825.20 × 30,620.32
  4. Step 4: Simplify right side
    83,220.64x = 3,822,187,568.06
  5. Step 5: Solve for x
    x = 3,822,187,568.06/83,220.64
  6. Step 6: Final answer
    x = 45,928.36

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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.