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Finding the Fourth Proportional to 65.36, 90.13 and 46.93

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Solution

The fourth proportional to 65.36, 90.13 and 46.93 is: 64.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.36 : 90.13 = 46.93 : x
  2. Step 2: Convert to fraction form
    65.36/90.13 = 46.93/x
  3. Step 3: Cross multiply
    65.36x = 90.13 × 46.93
  4. Step 4: Simplify right side
    65.36x = 4,229.80
  5. Step 5: Solve for x
    x = 4,229.80/65.36
  6. Step 6: Final answer
    x = 64.72

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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.