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Finding the Fourth Proportional to 64.02, 88.26 and 61.08

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Solution

The fourth proportional to 64.02, 88.26 and 61.08 is: 84.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.02 : 88.26 = 61.08 : x
  2. Step 2: Convert to fraction form
    64.02/88.26 = 61.08/x
  3. Step 3: Cross multiply
    64.02x = 88.26 × 61.08
  4. Step 4: Simplify right side
    64.02x = 5,390.92
  5. Step 5: Solve for x
    x = 5,390.92/64.02
  6. Step 6: Final answer
    x = 84.21

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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.