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Finding the Fourth Proportional to 221,007.52, 304,990.41 and 120,405.52

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Solution

The fourth proportional to 221,007.52, 304,990.41 and 120,405.52 is: 166,159.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,007.52 : 304,990.41 = 120,405.52 : x
  2. Step 2: Convert to fraction form
    221,007.52/304,990.41 = 120,405.52/x
  3. Step 3: Cross multiply
    221,007.52x = 304,990.41 × 120,405.52
  4. Step 4: Simplify right side
    221,007.52x = 36,722,528,911.06
  5. Step 5: Solve for x
    x = 36,722,528,911.06/221,007.52
  6. Step 6: Final answer
    x = 166,159.64

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1.5x scale

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.