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Finding the Fourth Proportional to 85,288.87, 127,870.12 and 40,873.33

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Solution

The fourth proportional to 85,288.87, 127,870.12 and 40,873.33 is: 61,279.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,288.87 : 127,870.12 = 40,873.33 : x
  2. Step 2: Convert to fraction form
    85,288.87/127,870.12 = 40,873.33/x
  3. Step 3: Cross multiply
    85,288.87x = 127,870.12 × 40,873.33
  4. Step 4: Simplify right side
    85,288.87x = 5,226,477,611.90
  5. Step 5: Solve for x
    x = 5,226,477,611.90/85,288.87
  6. Step 6: Final answer
    x = 61,279.71

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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.