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Finding the Fourth Proportional to 64.09, 88.04 and 53.11

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Solution

The fourth proportional to 64.09, 88.04 and 53.11 is: 72.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.09 : 88.04 = 53.11 : x
  2. Step 2: Convert to fraction form
    64.09/88.04 = 53.11/x
  3. Step 3: Cross multiply
    64.09x = 88.04 × 53.11
  4. Step 4: Simplify right side
    64.09x = 4,675.80
  5. Step 5: Solve for x
    x = 4,675.80/64.09
  6. Step 6: Final answer
    x = 72.96

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.