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Finding the Fourth Proportional to 86,013.42, 129,020.13 and 48,608.43

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Solution

The fourth proportional to 86,013.42, 129,020.13 and 48,608.43 is: 72,912.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,013.42 : 129,020.13 = 48,608.43 : x
  2. Step 2: Convert to fraction form
    86,013.42/129,020.13 = 48,608.43/x
  3. Step 3: Cross multiply
    86,013.42x = 129,020.13 × 48,608.43
  4. Step 4: Simplify right side
    86,013.42x = 6,271,465,957.70
  5. Step 5: Solve for x
    x = 6,271,465,957.70/86,013.42
  6. Step 6: Final answer
    x = 72,912.65

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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.