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Finding the Fourth Proportional to 147,346.72, 203,340 and 80,278.72

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Solution

The fourth proportional to 147,346.72, 203,340 and 80,278.72 is: 110,785.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,346.72 : 203,340 = 80,278.72 : x
  2. Step 2: Convert to fraction form
    147,346.72/203,340 = 80,278.72/x
  3. Step 3: Cross multiply
    147,346.72x = 203,340 × 80,278.72
  4. Step 4: Simplify right side
    147,346.72x = 16,323,874,924.80
  5. Step 5: Solve for x
    x = 16,323,874,924.80/147,346.72
  6. Step 6: Final answer
    x = 110,785.47

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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.