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Finding the Fourth Proportional to 268,663.72, 402,931.00 and 79,072.61

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Solution

The fourth proportional to 268,663.72, 402,931.00 and 79,072.61 is: 118,589.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,663.72 : 402,931.00 = 79,072.61 : x
  2. Step 2: Convert to fraction form
    268,663.72/402,931.00 = 79,072.61/x
  3. Step 3: Cross multiply
    268,663.72x = 402,931.00 × 79,072.61
  4. Step 4: Simplify right side
    268,663.72x = 31,860,805,123.40
  5. Step 5: Solve for x
    x = 31,860,805,123.40/268,663.72
  6. Step 6: Final answer
    x = 118,589.90

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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.