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Finding the Fourth Proportional to 65.07, 97.71 and 56.64

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Solution

The fourth proportional to 65.07, 97.71 and 56.64 is: 85.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.07 : 97.71 = 56.64 : x
  2. Step 2: Convert to fraction form
    65.07/97.71 = 56.64/x
  3. Step 3: Cross multiply
    65.07x = 97.71 × 56.64
  4. Step 4: Simplify right side
    65.07x = 5,534.29
  5. Step 5: Solve for x
    x = 5,534.29/65.07
  6. Step 6: Final answer
    x = 85.05

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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.