Home / 143,989.13-198,710.40-80,339.19

Finding the Fourth Proportional to 143,989.13, 198,710.40 and 80,339.19

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Solution

The fourth proportional to 143,989.13, 198,710.40 and 80,339.19 is: 110,871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,989.13 : 198,710.40 = 80,339.19 : x
  2. Step 2: Convert to fraction form
    143,989.13/198,710.40 = 80,339.19/x
  3. Step 3: Cross multiply
    143,989.13x = 198,710.40 × 80,339.19
  4. Step 4: Simplify right side
    143,989.13x = 15,964,232,580.58
  5. Step 5: Solve for x
    x = 15,964,232,580.58/143,989.13
  6. Step 6: Final answer
    x = 110,871.10

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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.