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Finding the Fourth Proportional to 91,299.84, 136,942.56 and 28,970.88

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Solution

The fourth proportional to 91,299.84, 136,942.56 and 28,970.88 is: 43,454.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,299.84 : 136,942.56 = 28,970.88 : x
  2. Step 2: Convert to fraction form
    91,299.84/136,942.56 = 28,970.88/x
  3. Step 3: Cross multiply
    91,299.84x = 136,942.56 × 28,970.88
  4. Step 4: Simplify right side
    91,299.84x = 3,967,346,472.65
  5. Step 5: Solve for x
    x = 3,967,346,472.65/91,299.84
  6. Step 6: Final answer
    x = 43,454.04

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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.