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Finding the Fourth Proportional to 83,620.78, 125,430.07 and 20,441.46

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Solution

The fourth proportional to 83,620.78, 125,430.07 and 20,441.46 is: 30,661.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,620.78 : 125,430.07 = 20,441.46 : x
  2. Step 2: Convert to fraction form
    83,620.78/125,430.07 = 20,441.46/x
  3. Step 3: Cross multiply
    83,620.78x = 125,430.07 × 20,441.46
  4. Step 4: Simplify right side
    83,620.78x = 2,563,973,157.97
  5. Step 5: Solve for x
    x = 2,563,973,157.97/83,620.78
  6. Step 6: Final answer
    x = 30,661.91

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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.