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Finding the Fourth Proportional to 74,145.76, 111,724.61 and 61,286.20

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Solution

The fourth proportional to 74,145.76, 111,724.61 and 61,286.20 is: 92,347.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,145.76 : 111,724.61 = 61,286.20 : x
  2. Step 2: Convert to fraction form
    74,145.76/111,724.61 = 61,286.20/x
  3. Step 3: Cross multiply
    74,145.76x = 111,724.61 × 61,286.20
  4. Step 4: Simplify right side
    74,145.76x = 6,847,176,486.95
  5. Step 5: Solve for x
    x = 6,847,176,486.95/74,145.76
  6. Step 6: Final answer
    x = 92,347.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.