Home / 91,788.31-126,431.85-64,884.55

Finding the Fourth Proportional to 91,788.31, 126,431.85 and 64,884.55

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Solution

The fourth proportional to 91,788.31, 126,431.85 and 64,884.55 is: 89,373.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,788.31 : 126,431.85 = 64,884.55 : x
  2. Step 2: Convert to fraction form
    91,788.31/126,431.85 = 64,884.55/x
  3. Step 3: Cross multiply
    91,788.31x = 126,431.85 × 64,884.55
  4. Step 4: Simplify right side
    91,788.31x = 8,203,473,692.92
  5. Step 5: Solve for x
    x = 8,203,473,692.92/91,788.31
  6. Step 6: Final answer
    x = 89,373.84

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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.