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Finding the Fourth Proportional to 143,555.32, 215,308.86 and 43,691.32

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Solution

The fourth proportional to 143,555.32, 215,308.86 and 43,691.32 is: 65,529.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,555.32 : 215,308.86 = 43,691.32 : x
  2. Step 2: Convert to fraction form
    143,555.32/215,308.86 = 43,691.32/x
  3. Step 3: Cross multiply
    143,555.32x = 215,308.86 × 43,691.32
  4. Step 4: Simplify right side
    143,555.32x = 9,407,128,301.10
  5. Step 5: Solve for x
    x = 9,407,128,301.10/143,555.32
  6. Step 6: Final answer
    x = 65,529.64

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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.