Home / 142,015.68-195,992.64-78,359.04

Finding the Fourth Proportional to 142,015.68, 195,992.64 and 78,359.04

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Solution

The fourth proportional to 142,015.68, 195,992.64 and 78,359.04 is: 108,141.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,015.68 : 195,992.64 = 78,359.04 : x
  2. Step 2: Convert to fraction form
    142,015.68/195,992.64 = 78,359.04/x
  3. Step 3: Cross multiply
    142,015.68x = 195,992.64 × 78,359.04
  4. Step 4: Simplify right side
    142,015.68x = 15,357,795,117.47
  5. Step 5: Solve for x
    x = 15,357,795,117.47/142,015.68
  6. Step 6: Final answer
    x = 108,141.55

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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.