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Finding the Fourth Proportional to 163,475.78, 225,617.55 and 91,855.94

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Solution

The fourth proportional to 163,475.78, 225,617.55 and 91,855.94 is: 126,772.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,475.78 : 225,617.55 = 91,855.94 : x
  2. Step 2: Convert to fraction form
    163,475.78/225,617.55 = 91,855.94/x
  3. Step 3: Cross multiply
    163,475.78x = 225,617.55 × 91,855.94
  4. Step 4: Simplify right side
    163,475.78x = 20,724,312,135.75
  5. Step 5: Solve for x
    x = 20,724,312,135.75/163,475.78
  6. Step 6: Final answer
    x = 126,772.98

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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.