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Finding the Fourth Proportional to 111,788.64, 154,268.21 and 64,042.18

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Solution

The fourth proportional to 111,788.64, 154,268.21 and 64,042.18 is: 88,378.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,788.64 : 154,268.21 = 64,042.18 : x
  2. Step 2: Convert to fraction form
    111,788.64/154,268.21 = 64,042.18/x
  3. Step 3: Cross multiply
    111,788.64x = 154,268.21 × 64,042.18
  4. Step 4: Simplify right side
    111,788.64x = 9,879,672,247.53
  5. Step 5: Solve for x
    x = 9,879,672,247.53/111,788.64
  6. Step 6: Final answer
    x = 88,378.14

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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.