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Finding the Fourth Proportional to 147,942, 221,619.78 and 68,947.56

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Solution

The fourth proportional to 147,942, 221,619.78 and 68,947.56 is: 103,284.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,942 : 221,619.78 = 68,947.56 : x
  2. Step 2: Convert to fraction form
    147,942/221,619.78 = 68,947.56/x
  3. Step 3: Cross multiply
    147,942x = 221,619.78 × 68,947.56
  4. Step 4: Simplify right side
    147,942x = 15,280,143,078.74
  5. Step 5: Solve for x
    x = 15,280,143,078.74/147,942
  6. Step 6: Final answer
    x = 103,284.69

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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.