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Finding the Fourth Proportional to 81,230.40, 121,586.40 and 63,604.80

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Solution

The fourth proportional to 81,230.40, 121,586.40 and 63,604.80 is: 95,204.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,230.40 : 121,586.40 = 63,604.80 : x
  2. Step 2: Convert to fraction form
    81,230.40/121,586.40 = 63,604.80/x
  3. Step 3: Cross multiply
    81,230.40x = 121,586.40 × 63,604.80
  4. Step 4: Simplify right side
    81,230.40x = 7,733,478,654.72
  5. Step 5: Solve for x
    x = 7,733,478,654.72/81,230.40
  6. Step 6: Final answer
    x = 95,204.24

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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.