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Finding the Fourth Proportional to 155,805.39, 215,011.80 and 87,822.63

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Solution

The fourth proportional to 155,805.39, 215,011.80 and 87,822.63 is: 121,195.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,805.39 : 215,011.80 = 87,822.63 : x
  2. Step 2: Convert to fraction form
    155,805.39/215,011.80 = 87,822.63/x
  3. Step 3: Cross multiply
    155,805.39x = 215,011.80 × 87,822.63
  4. Step 4: Simplify right side
    155,805.39x = 18,882,901,757.03
  5. Step 5: Solve for x
    x = 18,882,901,757.03/155,805.39
  6. Step 6: Final answer
    x = 121,195.43

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