Home / 142,438.87-196,562.28-78,775.30

Finding the Fourth Proportional to 142,438.87, 196,562.28 and 78,775.30

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Solution

The fourth proportional to 142,438.87, 196,562.28 and 78,775.30 is: 108,708.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,438.87 : 196,562.28 = 78,775.30 : x
  2. Step 2: Convert to fraction form
    142,438.87/196,562.28 = 78,775.30/x
  3. Step 3: Cross multiply
    142,438.87x = 196,562.28 × 78,775.30
  4. Step 4: Simplify right side
    142,438.87x = 15,484,252,575.68
  5. Step 5: Solve for x
    x = 15,484,252,575.68/142,438.87
  6. Step 6: Final answer
    x = 108,708.06

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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.