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Finding the Fourth Proportional to 70.61, 97.20 and 63.32

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Solution

The fourth proportional to 70.61, 97.20 and 63.32 is: 87.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.61 : 97.20 = 63.32 : x
  2. Step 2: Convert to fraction form
    70.61/97.20 = 63.32/x
  3. Step 3: Cross multiply
    70.61x = 97.20 × 63.32
  4. Step 4: Simplify right side
    70.61x = 6,154.22
  5. Step 5: Solve for x
    x = 6,154.22/70.61
  6. Step 6: Final answer
    x = 87.16

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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.