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Finding the Fourth Proportional to 83,894.70, 125,842.05 and 79,812.30

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Solution

The fourth proportional to 83,894.70, 125,842.05 and 79,812.30 is: 119,718.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,894.70 : 125,842.05 = 79,812.30 : x
  2. Step 2: Convert to fraction form
    83,894.70/125,842.05 = 79,812.30/x
  3. Step 3: Cross multiply
    83,894.70x = 125,842.05 × 79,812.30
  4. Step 4: Simplify right side
    83,894.70x = 10,043,743,447.22
  5. Step 5: Solve for x
    x = 10,043,743,447.22/83,894.70
  6. Step 6: Final answer
    x = 119,718.45

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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.