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Finding the Fourth Proportional to 64.35, 88.70 and 59.96

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Solution

The fourth proportional to 64.35, 88.70 and 59.96 is: 82.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.35 : 88.70 = 59.96 : x
  2. Step 2: Convert to fraction form
    64.35/88.70 = 59.96/x
  3. Step 3: Cross multiply
    64.35x = 88.70 × 59.96
  4. Step 4: Simplify right side
    64.35x = 5,317.71
  5. Step 5: Solve for x
    x = 5,317.71/64.35
  6. Step 6: Final answer
    x = 82.64

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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.