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Finding the Fourth Proportional to 178,710.88, 268,118.20 and 72,039.78

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Solution

The fourth proportional to 178,710.88, 268,118.20 and 72,039.78 is: 108,080.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,710.88 : 268,118.20 = 72,039.78 : x
  2. Step 2: Convert to fraction form
    178,710.88/268,118.20 = 72,039.78/x
  3. Step 3: Cross multiply
    178,710.88x = 268,118.20 × 72,039.78
  4. Step 4: Simplify right side
    178,710.88x = 19,315,176,967.34
  5. Step 5: Solve for x
    x = 19,315,176,967.34/178,710.88
  6. Step 6: Final answer
    x = 108,080.59

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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.