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Finding the Fourth Proportional to 83,812.80, 125,719.20 and 48,383.40

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Solution

The fourth proportional to 83,812.80, 125,719.20 and 48,383.40 is: 72,575.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,812.80 : 125,719.20 = 48,383.40 : x
  2. Step 2: Convert to fraction form
    83,812.80/125,719.20 = 48,383.40/x
  3. Step 3: Cross multiply
    83,812.80x = 125,719.20 × 48,383.40
  4. Step 4: Simplify right side
    83,812.80x = 6,082,722,341.28
  5. Step 5: Solve for x
    x = 6,082,722,341.28/83,812.80
  6. Step 6: Final answer
    x = 72,575.10

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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.