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Finding the Fourth Proportional to 64.03, 88.35 and 54.80

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Solution

The fourth proportional to 64.03, 88.35 and 54.80 is: 75.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.03 : 88.35 = 54.80 : x
  2. Step 2: Convert to fraction form
    64.03/88.35 = 54.80/x
  3. Step 3: Cross multiply
    64.03x = 88.35 × 54.80
  4. Step 4: Simplify right side
    64.03x = 4,841.58
  5. Step 5: Solve for x
    x = 4,841.58/64.03
  6. Step 6: Final answer
    x = 75.62

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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.