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Finding the Fourth Proportional to 221,032.80, 331,601.04 and 87,920.64

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Solution

The fourth proportional to 221,032.80, 331,601.04 and 87,920.64 is: 131,901.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,032.80 : 331,601.04 = 87,920.64 : x
  2. Step 2: Convert to fraction form
    221,032.80/331,601.04 = 87,920.64/x
  3. Step 3: Cross multiply
    221,032.80x = 331,601.04 × 87,920.64
  4. Step 4: Simplify right side
    221,032.80x = 29,154,575,661.47
  5. Step 5: Solve for x
    x = 29,154,575,661.47/221,032.80
  6. Step 6: Final answer
    x = 131,901.58

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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.