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Finding the Fourth Proportional to 147,318.78, 203,299.95 and 80,250.78

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Solution

The fourth proportional to 147,318.78, 203,299.95 and 80,250.78 is: 110,746.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,318.78 : 203,299.95 = 80,250.78 : x
  2. Step 2: Convert to fraction form
    147,318.78/203,299.95 = 80,250.78/x
  3. Step 3: Cross multiply
    147,318.78x = 203,299.95 × 80,250.78
  4. Step 4: Simplify right side
    147,318.78x = 16,314,979,561.46
  5. Step 5: Solve for x
    x = 16,314,979,561.46/147,318.78
  6. Step 6: Final answer
    x = 110,746.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.