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Finding the Fourth Proportional to 88,729.70, 133,094.55 and 79,981.70

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Solution

The fourth proportional to 88,729.70, 133,094.55 and 79,981.70 is: 119,972.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,729.70 : 133,094.55 = 79,981.70 : x
  2. Step 2: Convert to fraction form
    88,729.70/133,094.55 = 79,981.70/x
  3. Step 3: Cross multiply
    88,729.70x = 133,094.55 × 79,981.70
  4. Step 4: Simplify right side
    88,729.70x = 10,645,128,369.74
  5. Step 5: Solve for x
    x = 10,645,128,369.74/88,729.70
  6. Step 6: Final answer
    x = 119,972.55

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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.