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Finding the Fourth Proportional to 64.59, 96.88 and 55.47

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Solution

The fourth proportional to 64.59, 96.88 and 55.47 is: 83.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.59 : 96.88 = 55.47 : x
  2. Step 2: Convert to fraction form
    64.59/96.88 = 55.47/x
  3. Step 3: Cross multiply
    64.59x = 96.88 × 55.47
  4. Step 4: Simplify right side
    64.59x = 5,373.93
  5. Step 5: Solve for x
    x = 5,373.93/64.59
  6. Step 6: Final answer
    x = 83.20

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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.