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Finding the Fourth Proportional to 64.77, 97.12 and 46.72

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Solution

The fourth proportional to 64.77, 97.12 and 46.72 is: 70.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.77 : 97.12 = 46.72 : x
  2. Step 2: Convert to fraction form
    64.77/97.12 = 46.72/x
  3. Step 3: Cross multiply
    64.77x = 97.12 × 46.72
  4. Step 4: Simplify right side
    64.77x = 4,537.45
  5. Step 5: Solve for x
    x = 4,537.45/64.77
  6. Step 6: Final answer
    x = 70.05

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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.