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Finding the Fourth Proportional to 221,020.80, 331,574.40 and 94,660.80

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Solution

The fourth proportional to 221,020.80, 331,574.40 and 94,660.80 is: 142,009.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,020.80 : 331,574.40 = 94,660.80 : x
  2. Step 2: Convert to fraction form
    221,020.80/331,574.40 = 94,660.80/x
  3. Step 3: Cross multiply
    221,020.80x = 331,574.40 × 94,660.80
  4. Step 4: Simplify right side
    221,020.80x = 31,387,097,963.52
  5. Step 5: Solve for x
    x = 31,387,097,963.52/221,020.80
  6. Step 6: Final answer
    x = 142,009.70

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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.