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Finding the Fourth Proportional to 243,071.87, 335,438.57 and 135,640.76

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Solution

The fourth proportional to 243,071.87, 335,438.57 and 135,640.76 is: 187,183.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,071.87 : 335,438.57 = 135,640.76 : x
  2. Step 2: Convert to fraction form
    243,071.87/335,438.57 = 135,640.76/x
  3. Step 3: Cross multiply
    243,071.87x = 335,438.57 × 135,640.76
  4. Step 4: Simplify right side
    243,071.87x = 45,499,141,889.91
  5. Step 5: Solve for x
    x = 45,499,141,889.91/243,071.87
  6. Step 6: Final answer
    x = 187,183.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.