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Finding the Fourth Proportional to 107.30, 147.78 and 93.48

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Solution

The fourth proportional to 107.30, 147.78 and 93.48 is: 128.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.30 : 147.78 = 93.48 : x
  2. Step 2: Convert to fraction form
    107.30/147.78 = 93.48/x
  3. Step 3: Cross multiply
    107.30x = 147.78 × 93.48
  4. Step 4: Simplify right side
    107.30x = 13,814.47
  5. Step 5: Solve for x
    x = 13,814.47/107.30
  6. Step 6: Final answer
    x = 128.75

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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.