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Finding the Fourth Proportional to 64.10, 88.14 and 62.18

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Solution

The fourth proportional to 64.10, 88.14 and 62.18 is: 85.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.10 : 88.14 = 62.18 : x
  2. Step 2: Convert to fraction form
    64.10/88.14 = 62.18/x
  3. Step 3: Cross multiply
    64.10x = 88.14 × 62.18
  4. Step 4: Simplify right side
    64.10x = 5,480.10
  5. Step 5: Solve for x
    x = 5,480.10/64.10
  6. Step 6: Final answer
    x = 85.50

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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.