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Finding the Fourth Proportional to 86,734.80, 130,199.40 and 67,100.40

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Solution

The fourth proportional to 86,734.80, 130,199.40 and 67,100.40 is: 100,725.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,734.80 : 130,199.40 = 67,100.40 : x
  2. Step 2: Convert to fraction form
    86,734.80/130,199.40 = 67,100.40/x
  3. Step 3: Cross multiply
    86,734.80x = 130,199.40 × 67,100.40
  4. Step 4: Simplify right side
    86,734.80x = 8,736,431,819.76
  5. Step 5: Solve for x
    x = 8,736,431,819.76/86,734.80
  6. Step 6: Final answer
    x = 100,725.80

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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.