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Finding the Fourth Proportional to 86,912.40, 130,217.40 and 40,069.20

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Solution

The fourth proportional to 86,912.40, 130,217.40 and 40,069.20 is: 60,034.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,912.40 : 130,217.40 = 40,069.20 : x
  2. Step 2: Convert to fraction form
    86,912.40/130,217.40 = 40,069.20/x
  3. Step 3: Cross multiply
    86,912.40x = 130,217.40 × 40,069.20
  4. Step 4: Simplify right side
    86,912.40x = 5,217,707,044.08
  5. Step 5: Solve for x
    x = 5,217,707,044.08/86,912.40
  6. Step 6: Final answer
    x = 60,034.09

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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.