Home / 205,328.73-307,989.43-105,430.21

Finding the Fourth Proportional to 205,328.73, 307,989.43 and 105,430.21

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Solution

The fourth proportional to 205,328.73, 307,989.43 and 105,430.21 is: 158,143.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,328.73 : 307,989.43 = 105,430.21 : x
  2. Step 2: Convert to fraction form
    205,328.73/307,989.43 = 105,430.21/x
  3. Step 3: Cross multiply
    205,328.73x = 307,989.43 × 105,430.21
  4. Step 4: Simplify right side
    205,328.73x = 32,471,390,282.68
  5. Step 5: Solve for x
    x = 32,471,390,282.68/205,328.73
  6. Step 6: Final answer
    x = 158,143.43

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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.