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Finding the Fourth Proportional to 111,935.76, 154,424.20 and 74,144.40

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Solution

The fourth proportional to 111,935.76, 154,424.20 and 74,144.40 is: 102,288.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,935.76 : 154,424.20 = 74,144.40 : x
  2. Step 2: Convert to fraction form
    111,935.76/154,424.20 = 74,144.40/x
  3. Step 3: Cross multiply
    111,935.76x = 154,424.20 × 74,144.40
  4. Step 4: Simplify right side
    111,935.76x = 11,449,689,654.48
  5. Step 5: Solve for x
    x = 11,449,689,654.48/111,935.76
  6. Step 6: Final answer
    x = 102,288.04

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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.