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Finding the Fourth Proportional to 86,627.87, 129,760.55 and 69,669.20

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Solution

The fourth proportional to 86,627.87, 129,760.55 and 69,669.20 is: 104,358.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,627.87 : 129,760.55 = 69,669.20 : x
  2. Step 2: Convert to fraction form
    86,627.87/129,760.55 = 69,669.20/x
  3. Step 3: Cross multiply
    86,627.87x = 129,760.55 × 69,669.20
  4. Step 4: Simplify right side
    86,627.87x = 9,040,313,361.71
  5. Step 5: Solve for x
    x = 9,040,313,361.71/86,627.87
  6. Step 6: Final answer
    x = 104,358.02

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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.