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Finding the Fourth Proportional to 127.99, 192.08 and 87.53

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Solution

The fourth proportional to 127.99, 192.08 and 87.53 is: 131.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.99 : 192.08 = 87.53 : x
  2. Step 2: Convert to fraction form
    127.99/192.08 = 87.53/x
  3. Step 3: Cross multiply
    127.99x = 192.08 × 87.53
  4. Step 4: Simplify right side
    127.99x = 16,812.02
  5. Step 5: Solve for x
    x = 16,812.02/127.99
  6. Step 6: Final answer
    x = 131.36

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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.