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Finding the Fourth Proportional to 148,857.90, 223,027.65 and 128,121.90

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Solution

The fourth proportional to 148,857.90, 223,027.65 and 128,121.90 is: 191,959.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,857.90 : 223,027.65 = 128,121.90 : x
  2. Step 2: Convert to fraction form
    148,857.90/223,027.65 = 128,121.90/x
  3. Step 3: Cross multiply
    148,857.90x = 223,027.65 × 128,121.90
  4. Step 4: Simplify right side
    148,857.90x = 28,574,726,270.54
  5. Step 5: Solve for x
    x = 28,574,726,270.54/148,857.90
  6. Step 6: Final answer
    x = 191,959.76

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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.