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Finding the Fourth Proportional to 88.07, 131.61 and 70.76

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Solution

The fourth proportional to 88.07, 131.61 and 70.76 is: 105.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.07 : 131.61 = 70.76 : x
  2. Step 2: Convert to fraction form
    88.07/131.61 = 70.76/x
  3. Step 3: Cross multiply
    88.07x = 131.61 × 70.76
  4. Step 4: Simplify right side
    88.07x = 9,312.07
  5. Step 5: Solve for x
    x = 9,312.07/88.07
  6. Step 6: Final answer
    x = 105.74

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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.