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Finding the Fourth Proportional to 76,557.48, 114,821.16 and 72,759.90

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Solution

The fourth proportional to 76,557.48, 114,821.16 and 72,759.90 is: 109,125.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,557.48 : 114,821.16 = 72,759.90 : x
  2. Step 2: Convert to fraction form
    76,557.48/114,821.16 = 72,759.90/x
  3. Step 3: Cross multiply
    76,557.48x = 114,821.16 × 72,759.90
  4. Step 4: Simplify right side
    76,557.48x = 8,354,376,119.48
  5. Step 5: Solve for x
    x = 8,354,376,119.48/76,557.48
  6. Step 6: Final answer
    x = 109,125.54

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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.