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Finding the Fourth Proportional to 143,978.01, 215,967.03 and 73,812.57

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Solution

The fourth proportional to 143,978.01, 215,967.03 and 73,812.57 is: 110,718.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,978.01 : 215,967.03 = 73,812.57 : x
  2. Step 2: Convert to fraction form
    143,978.01/215,967.03 = 73,812.57/x
  3. Step 3: Cross multiply
    143,978.01x = 215,967.03 × 73,812.57
  4. Step 4: Simplify right side
    143,978.01x = 15,941,081,519.57
  5. Step 5: Solve for x
    x = 15,941,081,519.57/143,978.01
  6. Step 6: Final answer
    x = 110,718.86

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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.