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Finding the Fourth Proportional to 64.78, 96.35 and 59.60

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Solution

The fourth proportional to 64.78, 96.35 and 59.60 is: 88.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.78 : 96.35 = 59.60 : x
  2. Step 2: Convert to fraction form
    64.78/96.35 = 59.60/x
  3. Step 3: Cross multiply
    64.78x = 96.35 × 59.60
  4. Step 4: Simplify right side
    64.78x = 5,742.40
  5. Step 5: Solve for x
    x = 5,742.40/64.78
  6. Step 6: Final answer
    x = 88.65

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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.