Home / 142,131.10-196,140.38-78,468.44

Finding the Fourth Proportional to 142,131.10, 196,140.38 and 78,468.44

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Solution

The fourth proportional to 142,131.10, 196,140.38 and 78,468.44 is: 108,286.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,131.10 : 196,140.38 = 78,468.44 : x
  2. Step 2: Convert to fraction form
    142,131.10/196,140.38 = 78,468.44/x
  3. Step 3: Cross multiply
    142,131.10x = 196,140.38 × 78,468.44
  4. Step 4: Simplify right side
    142,131.10x = 15,390,829,933.79
  5. Step 5: Solve for x
    x = 15,390,829,933.79/142,131.10
  6. Step 6: Final answer
    x = 108,286.15

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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.