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Finding the Fourth Proportional to 111,866.20, 154,370.80 and 64,086.32

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Solution

The fourth proportional to 111,866.20, 154,370.80 and 64,086.32 is: 88,436.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,866.20 : 154,370.80 = 64,086.32 : x
  2. Step 2: Convert to fraction form
    111,866.20/154,370.80 = 64,086.32/x
  3. Step 3: Cross multiply
    111,866.20x = 154,370.80 × 64,086.32
  4. Step 4: Simplify right side
    111,866.20x = 9,893,056,487.46
  5. Step 5: Solve for x
    x = 9,893,056,487.46/111,866.20
  6. Step 6: Final answer
    x = 88,436.51

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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.