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Finding the Fourth Proportional to 151,357.29, 208,873.04 and 87,731.99

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Solution

The fourth proportional to 151,357.29, 208,873.04 and 87,731.99 is: 121,070.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,357.29 : 208,873.04 = 87,731.99 : x
  2. Step 2: Convert to fraction form
    151,357.29/208,873.04 = 87,731.99/x
  3. Step 3: Cross multiply
    151,357.29x = 208,873.04 × 87,731.99
  4. Step 4: Simplify right side
    151,357.29x = 18,324,845,973.52
  5. Step 5: Solve for x
    x = 18,324,845,973.52/151,357.29
  6. Step 6: Final answer
    x = 121,070.12

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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.