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Finding the Fourth Proportional to 107.03, 147.62 and 90.71

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Solution

The fourth proportional to 107.03, 147.62 and 90.71 is: 125.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.03 : 147.62 = 90.71 : x
  2. Step 2: Convert to fraction form
    107.03/147.62 = 90.71/x
  3. Step 3: Cross multiply
    107.03x = 147.62 × 90.71
  4. Step 4: Simplify right side
    107.03x = 13,390.16
  5. Step 5: Solve for x
    x = 13,390.16/107.03
  6. Step 6: Final answer
    x = 125.11

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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.