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Finding the Fourth Proportional to 221,145.90, 305,166.15 and 124,351.98

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Solution

The fourth proportional to 221,145.90, 305,166.15 and 124,351.98 is: 171,597.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,145.90 : 305,166.15 = 124,351.98 : x
  2. Step 2: Convert to fraction form
    221,145.90/305,166.15 = 124,351.98/x
  3. Step 3: Cross multiply
    221,145.90x = 305,166.15 × 124,351.98
  4. Step 4: Simplify right side
    221,145.90x = 37,948,014,981.48
  5. Step 5: Solve for x
    x = 37,948,014,981.48/221,145.90
  6. Step 6: Final answer
    x = 171,597.19

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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.