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Finding the Fourth Proportional to 151,357.67, 208,873.55 and 87,732.36

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Solution

The fourth proportional to 151,357.67, 208,873.55 and 87,732.36 is: 121,070.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,357.67 : 208,873.55 = 87,732.36 : x
  2. Step 2: Convert to fraction form
    151,357.67/208,873.55 = 87,732.36/x
  3. Step 3: Cross multiply
    151,357.67x = 208,873.55 × 87,732.36
  4. Step 4: Simplify right side
    151,357.67x = 18,324,969,044.42
  5. Step 5: Solve for x
    x = 18,324,969,044.42/151,357.67
  6. Step 6: Final answer
    x = 121,070.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.