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Finding the Fourth Proportional to 88.15, 131.68 and 70.13

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Solution

The fourth proportional to 88.15, 131.68 and 70.13 is: 104.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.15 : 131.68 = 70.13 : x
  2. Step 2: Convert to fraction form
    88.15/131.68 = 70.13/x
  3. Step 3: Cross multiply
    88.15x = 131.68 × 70.13
  4. Step 4: Simplify right side
    88.15x = 9,234.72
  5. Step 5: Solve for x
    x = 9,234.72/88.15
  6. Step 6: Final answer
    x = 104.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.