Home / 142,121.22-196,124.12-77,587.98

Finding the Fourth Proportional to 142,121.22, 196,124.12 and 77,587.98

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Solution

The fourth proportional to 142,121.22, 196,124.12 and 77,587.98 is: 107,069.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,121.22 : 196,124.12 = 77,587.98 : x
  2. Step 2: Convert to fraction form
    142,121.22/196,124.12 = 77,587.98/x
  3. Step 3: Cross multiply
    142,121.22x = 196,124.12 × 77,587.98
  4. Step 4: Simplify right side
    142,121.22x = 15,216,873,912.14
  5. Step 5: Solve for x
    x = 15,216,873,912.14/142,121.22
  6. Step 6: Final answer
    x = 107,069.68

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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.