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Finding the Fourth Proportional to 83,230.40, 124,586.40 and 80,638.40

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Solution

The fourth proportional to 83,230.40, 124,586.40 and 80,638.40 is: 120,706.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,230.40 : 124,586.40 = 80,638.40 : x
  2. Step 2: Convert to fraction form
    83,230.40/124,586.40 = 80,638.40/x
  3. Step 3: Cross multiply
    83,230.40x = 124,586.40 × 80,638.40
  4. Step 4: Simplify right side
    83,230.40x = 10,046,447,957.76
  5. Step 5: Solve for x
    x = 10,046,447,957.76/83,230.40
  6. Step 6: Final answer
    x = 120,706.47

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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.