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Finding the Fourth Proportional to 91,745.96, 137,439.69 and 63,215.64

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Solution

The fourth proportional to 91,745.96, 137,439.69 and 63,215.64 is: 94,699.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,745.96 : 137,439.69 = 63,215.64 : x
  2. Step 2: Convert to fraction form
    91,745.96/137,439.69 = 63,215.64/x
  3. Step 3: Cross multiply
    91,745.96x = 137,439.69 × 63,215.64
  4. Step 4: Simplify right side
    91,745.96x = 8,688,337,964.75
  5. Step 5: Solve for x
    x = 8,688,337,964.75/91,745.96
  6. Step 6: Final answer
    x = 94,699.95

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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.