Home / 143,985.75-198,705.79-80,335.95

Finding the Fourth Proportional to 143,985.75, 198,705.79 and 80,335.95

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Solution

The fourth proportional to 143,985.75, 198,705.79 and 80,335.95 is: 110,866.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,985.75 : 198,705.79 = 80,335.95 : x
  2. Step 2: Convert to fraction form
    143,985.75/198,705.79 = 80,335.95/x
  3. Step 3: Cross multiply
    143,985.75x = 198,705.79 × 80,335.95
  4. Step 4: Simplify right side
    143,985.75x = 15,963,218,410.15
  5. Step 5: Solve for x
    x = 15,963,218,410.15/143,985.75
  6. Step 6: Final answer
    x = 110,866.65

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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.