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Finding the Fourth Proportional to 107.04, 147.63 and 74.31

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Solution

The fourth proportional to 107.04, 147.63 and 74.31 is: 102.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.04 : 147.63 = 74.31 : x
  2. Step 2: Convert to fraction form
    107.04/147.63 = 74.31/x
  3. Step 3: Cross multiply
    107.04x = 147.63 × 74.31
  4. Step 4: Simplify right side
    107.04x = 10,970.39
  5. Step 5: Solve for x
    x = 10,970.39/107.04
  6. Step 6: Final answer
    x = 102.49

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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.