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Finding the Fourth Proportional to 92.51, 127.70 and 64.98

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Solution

The fourth proportional to 92.51, 127.70 and 64.98 is: 89.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.51 : 127.70 = 64.98 : x
  2. Step 2: Convert to fraction form
    92.51/127.70 = 64.98/x
  3. Step 3: Cross multiply
    92.51x = 127.70 × 64.98
  4. Step 4: Simplify right side
    92.51x = 8,297.14
  5. Step 5: Solve for x
    x = 8,297.14/92.51
  6. Step 6: Final answer
    x = 89.69

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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.