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Finding the Fourth Proportional to 143,724.63, 215,507.59 and 66,703.65

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Solution

The fourth proportional to 143,724.63, 215,507.59 and 66,703.65 is: 100,018.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,724.63 : 215,507.59 = 66,703.65 : x
  2. Step 2: Convert to fraction form
    143,724.63/215,507.59 = 66,703.65/x
  3. Step 3: Cross multiply
    143,724.63x = 215,507.59 × 66,703.65
  4. Step 4: Simplify right side
    143,724.63x = 14,375,143,093.02
  5. Step 5: Solve for x
    x = 14,375,143,093.02/143,724.63
  6. Step 6: Final answer
    x = 100,018.65

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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.