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Finding the Fourth Proportional to 81,478.65, 122,272.65 and 48,163.35

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Solution

The fourth proportional to 81,478.65, 122,272.65 and 48,163.35 is: 72,277.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,478.65 : 122,272.65 = 48,163.35 : x
  2. Step 2: Convert to fraction form
    81,478.65/122,272.65 = 48,163.35/x
  3. Step 3: Cross multiply
    81,478.65x = 122,272.65 × 48,163.35
  4. Step 4: Simplify right side
    81,478.65x = 5,889,060,437.38
  5. Step 5: Solve for x
    x = 5,889,060,437.38/81,478.65
  6. Step 6: Final answer
    x = 72,277.34

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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.