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Finding the Fourth Proportional to 151,489.58, 209,055.53 and 87,864.21

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Solution

The fourth proportional to 151,489.58, 209,055.53 and 87,864.21 is: 121,252.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,489.58 : 209,055.53 = 87,864.21 : x
  2. Step 2: Convert to fraction form
    151,489.58/209,055.53 = 87,864.21/x
  3. Step 3: Cross multiply
    151,489.58x = 209,055.53 × 87,864.21
  4. Step 4: Simplify right side
    151,489.58x = 18,368,499,209.24
  5. Step 5: Solve for x
    x = 18,368,499,209.24/151,489.58
  6. Step 6: Final answer
    x = 121,252.56

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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.