Home / 143,764.31-198,390.17-90,078.32

Finding the Fourth Proportional to 143,764.31, 198,390.17 and 90,078.32

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Solution

The fourth proportional to 143,764.31, 198,390.17 and 90,078.32 is: 124,305.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,764.31 : 198,390.17 = 90,078.32 : x
  2. Step 2: Convert to fraction form
    143,764.31/198,390.17 = 90,078.32/x
  3. Step 3: Cross multiply
    143,764.31x = 198,390.17 × 90,078.32
  4. Step 4: Simplify right side
    143,764.31x = 17,870,651,775.77
  5. Step 5: Solve for x
    x = 17,870,651,775.77/143,764.31
  6. Step 6: Final answer
    x = 124,305.21

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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.