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Finding the Fourth Proportional to 143,646.54, 215,397.72 and 83,694.39

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Solution

The fourth proportional to 143,646.54, 215,397.72 and 83,694.39 is: 125,499.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,646.54 : 215,397.72 = 83,694.39 : x
  2. Step 2: Convert to fraction form
    143,646.54/215,397.72 = 83,694.39/x
  3. Step 3: Cross multiply
    143,646.54x = 215,397.72 × 83,694.39
  4. Step 4: Simplify right side
    143,646.54x = 18,027,580,782.79
  5. Step 5: Solve for x
    x = 18,027,580,782.79/143,646.54
  6. Step 6: Final answer
    x = 125,499.58

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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.