Home / 142,283.96-196,351.80-78,621.20

Finding the Fourth Proportional to 142,283.96, 196,351.80 and 78,621.20

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Solution

The fourth proportional to 142,283.96, 196,351.80 and 78,621.20 is: 108,497.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,283.96 : 196,351.80 = 78,621.20 : x
  2. Step 2: Convert to fraction form
    142,283.96/196,351.80 = 78,621.20/x
  3. Step 3: Cross multiply
    142,283.96x = 196,351.80 × 78,621.20
  4. Step 4: Simplify right side
    142,283.96x = 15,437,414,138.16
  5. Step 5: Solve for x
    x = 15,437,414,138.16/142,283.96
  6. Step 6: Final answer
    x = 108,497.22

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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.