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Finding the Fourth Proportional to 215,897.60, 323,731.20 and 91,097.60

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Solution

The fourth proportional to 215,897.60, 323,731.20 and 91,097.60 is: 136,597.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,897.60 : 323,731.20 = 91,097.60 : x
  2. Step 2: Convert to fraction form
    215,897.60/323,731.20 = 91,097.60/x
  3. Step 3: Cross multiply
    215,897.60x = 323,731.20 × 91,097.60
  4. Step 4: Simplify right side
    215,897.60x = 29,491,135,365.12
  5. Step 5: Solve for x
    x = 29,491,135,365.12/215,897.60
  6. Step 6: Final answer
    x = 136,597.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.