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Finding the Fourth Proportional to 91,575.67, 126,250.35 and 78,289.64

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Solution

The fourth proportional to 91,575.67, 126,250.35 and 78,289.64 is: 107,933.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,575.67 : 126,250.35 = 78,289.64 : x
  2. Step 2: Convert to fraction form
    91,575.67/126,250.35 = 78,289.64/x
  3. Step 3: Cross multiply
    91,575.67x = 126,250.35 × 78,289.64
  4. Step 4: Simplify right side
    91,575.67x = 9,884,094,451.37
  5. Step 5: Solve for x
    x = 9,884,094,451.37/91,575.67
  6. Step 6: Final answer
    x = 107,933.64

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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.