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Finding the Fourth Proportional to 148.47, 222.65 and 83.40

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Solution

The fourth proportional to 148.47, 222.65 and 83.40 is: 125.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.47 : 222.65 = 83.40 : x
  2. Step 2: Convert to fraction form
    148.47/222.65 = 83.40/x
  3. Step 3: Cross multiply
    148.47x = 222.65 × 83.40
  4. Step 4: Simplify right side
    148.47x = 18,567.48
  5. Step 5: Solve for x
    x = 18,567.48/148.47
  6. Step 6: Final answer
    x = 125.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.