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Finding the Fourth Proportional to 107.55, 148.36 and 70.70

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Solution

The fourth proportional to 107.55, 148.36 and 70.70 is: 97.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.55 : 148.36 = 70.70 : x
  2. Step 2: Convert to fraction form
    107.55/148.36 = 70.70/x
  3. Step 3: Cross multiply
    107.55x = 148.36 × 70.70
  4. Step 4: Simplify right side
    107.55x = 10,488.13
  5. Step 5: Solve for x
    x = 10,488.13/107.55
  6. Step 6: Final answer
    x = 97.52

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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.