Home / 142,640.02-196,846.32-78,112

Finding the Fourth Proportional to 142,640.02, 196,846.32 and 78,112

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Solution

The fourth proportional to 142,640.02, 196,846.32 and 78,112 is: 107,796.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,640.02 : 196,846.32 = 78,112 : x
  2. Step 2: Convert to fraction form
    142,640.02/196,846.32 = 78,112/x
  3. Step 3: Cross multiply
    142,640.02x = 196,846.32 × 78,112
  4. Step 4: Simplify right side
    142,640.02x = 15,376,059,747.84
  5. Step 5: Solve for x
    x = 15,376,059,747.84/142,640.02
  6. Step 6: Final answer
    x = 107,796.25

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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.