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Finding the Fourth Proportional to 91,986.90, 137,652.30 and 63,774.60

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Solution

The fourth proportional to 91,986.90, 137,652.30 and 63,774.60 is: 95,434.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,986.90 : 137,652.30 = 63,774.60 : x
  2. Step 2: Convert to fraction form
    91,986.90/137,652.30 = 63,774.60/x
  3. Step 3: Cross multiply
    91,986.90x = 137,652.30 × 63,774.60
  4. Step 4: Simplify right side
    91,986.90x = 8,778,720,371.58
  5. Step 5: Solve for x
    x = 8,778,720,371.58/91,986.90
  6. Step 6: Final answer
    x = 95,434.46

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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.