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Finding the Fourth Proportional to 143,781.68, 215,672.63 and 64,803.65

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Solution

The fourth proportional to 143,781.68, 215,672.63 and 64,803.65 is: 97,205.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,781.68 : 215,672.63 = 64,803.65 : x
  2. Step 2: Convert to fraction form
    143,781.68/215,672.63 = 64,803.65/x
  3. Step 3: Cross multiply
    143,781.68x = 215,672.63 × 64,803.65
  4. Step 4: Simplify right side
    143,781.68x = 13,976,372,226.72
  5. Step 5: Solve for x
    x = 13,976,372,226.72/143,781.68
  6. Step 6: Final answer
    x = 97,205.51

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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.