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Finding the Fourth Proportional to 111,671.76, 154,120.14 and 66,350.12

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Solution

The fourth proportional to 111,671.76, 154,120.14 and 66,350.12 is: 91,570.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,671.76 : 154,120.14 = 66,350.12 : x
  2. Step 2: Convert to fraction form
    111,671.76/154,120.14 = 66,350.12/x
  3. Step 3: Cross multiply
    111,671.76x = 154,120.14 × 66,350.12
  4. Step 4: Simplify right side
    111,671.76x = 10,225,889,783.42
  5. Step 5: Solve for x
    x = 10,225,889,783.42/111,671.76
  6. Step 6: Final answer
    x = 91,570.96

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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.