Home / 216,545.13-324,873.05-90,143.35

Finding the Fourth Proportional to 216,545.13, 324,873.05 and 90,143.35

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Solution

The fourth proportional to 216,545.13, 324,873.05 and 90,143.35 is: 135,238.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,545.13 : 324,873.05 = 90,143.35 : x
  2. Step 2: Convert to fraction form
    216,545.13/324,873.05 = 90,143.35/x
  3. Step 3: Cross multiply
    216,545.13x = 324,873.05 × 90,143.35
  4. Step 4: Simplify right side
    216,545.13x = 29,285,145,051.72
  5. Step 5: Solve for x
    x = 29,285,145,051.72/216,545.13
  6. Step 6: Final answer
    x = 135,238.07

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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.