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Finding the Fourth Proportional to 151,282.79, 208,798.24 and 87,620.57

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Solution

The fourth proportional to 151,282.79, 208,798.24 and 87,620.57 is: 120,932.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,282.79 : 208,798.24 = 87,620.57 : x
  2. Step 2: Convert to fraction form
    151,282.79/208,798.24 = 87,620.57/x
  3. Step 3: Cross multiply
    151,282.79x = 208,798.24 × 87,620.57
  4. Step 4: Simplify right side
    151,282.79x = 18,295,019,759.81
  5. Step 5: Solve for x
    x = 18,295,019,759.81/151,282.79
  6. Step 6: Final answer
    x = 120,932.59

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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.