Home / 143,145.40-214,545.30-72,988.60

Finding the Fourth Proportional to 143,145.40, 214,545.30 and 72,988.60

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Solution

The fourth proportional to 143,145.40, 214,545.30 and 72,988.60 is: 109,394.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,145.40 : 214,545.30 = 72,988.60 : x
  2. Step 2: Convert to fraction form
    143,145.40/214,545.30 = 72,988.60/x
  3. Step 3: Cross multiply
    143,145.40x = 214,545.30 × 72,988.60
  4. Step 4: Simplify right side
    143,145.40x = 15,659,361,083.58
  5. Step 5: Solve for x
    x = 15,659,361,083.58/143,145.40
  6. Step 6: Final answer
    x = 109,394.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.