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Finding the Fourth Proportional to 83,460.50, 125,190.90 and 20,280.68

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Solution

The fourth proportional to 83,460.50, 125,190.90 and 20,280.68 is: 30,421.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,460.50 : 125,190.90 = 20,280.68 : x
  2. Step 2: Convert to fraction form
    83,460.50/125,190.90 = 20,280.68/x
  3. Step 3: Cross multiply
    83,460.50x = 125,190.90 × 20,280.68
  4. Step 4: Simplify right side
    83,460.50x = 2,538,955,955.86
  5. Step 5: Solve for x
    x = 2,538,955,955.86/83,460.50
  6. Step 6: Final answer
    x = 30,421.05

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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.