Home / 143,665.85-198,065.66-100,587.42

Finding the Fourth Proportional to 143,665.85, 198,065.66 and 100,587.42

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Solution

The fourth proportional to 143,665.85, 198,065.66 and 100,587.42 is: 138,675.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,665.85 : 198,065.66 = 100,587.42 : x
  2. Step 2: Convert to fraction form
    143,665.85/198,065.66 = 100,587.42/x
  3. Step 3: Cross multiply
    143,665.85x = 198,065.66 × 100,587.42
  4. Step 4: Simplify right side
    143,665.85x = 19,922,913,227.06
  5. Step 5: Solve for x
    x = 19,922,913,227.06/143,665.85
  6. Step 6: Final answer
    x = 138,675.36

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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.