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Finding the Fourth Proportional to 102,750.75, 154,126.13 and 28,878.75

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Solution

The fourth proportional to 102,750.75, 154,126.13 and 28,878.75 is: 43,318.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,750.75 : 154,126.13 = 28,878.75 : x
  2. Step 2: Convert to fraction form
    102,750.75/154,126.13 = 28,878.75/x
  3. Step 3: Cross multiply
    102,750.75x = 154,126.13 × 28,878.75
  4. Step 4: Simplify right side
    102,750.75x = 4,450,969,832.34
  5. Step 5: Solve for x
    x = 4,450,969,832.34/102,750.75
  6. Step 6: Final answer
    x = 43,318.13

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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.