Home / 142,145.94-196,162.86-78,483.59

Finding the Fourth Proportional to 142,145.94, 196,162.86 and 78,483.59

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Solution

The fourth proportional to 142,145.94, 196,162.86 and 78,483.59 is: 108,308.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,145.94 : 196,162.86 = 78,483.59 : x
  2. Step 2: Convert to fraction form
    142,145.94/196,162.86 = 78,483.59/x
  3. Step 3: Cross multiply
    142,145.94x = 196,162.86 × 78,483.59
  4. Step 4: Simplify right side
    142,145.94x = 15,395,564,496.65
  5. Step 5: Solve for x
    x = 15,395,564,496.65/142,145.94
  6. Step 6: Final answer
    x = 108,308.15

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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.