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Finding the Fourth Proportional to 75.02, 112.59 and 64.89

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Solution

The fourth proportional to 75.02, 112.59 and 64.89 is: 97.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.02 : 112.59 = 64.89 : x
  2. Step 2: Convert to fraction form
    75.02/112.59 = 64.89/x
  3. Step 3: Cross multiply
    75.02x = 112.59 × 64.89
  4. Step 4: Simplify right side
    75.02x = 7,305.97
  5. Step 5: Solve for x
    x = 7,305.97/75.02
  6. Step 6: Final answer
    x = 97.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.