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Finding the Fourth Proportional to 98.02, 135.29 and 65.30

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Solution

The fourth proportional to 98.02, 135.29 and 65.30 is: 90.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.02 : 135.29 = 65.30 : x
  2. Step 2: Convert to fraction form
    98.02/135.29 = 65.30/x
  3. Step 3: Cross multiply
    98.02x = 135.29 × 65.30
  4. Step 4: Simplify right side
    98.02x = 8,834.11
  5. Step 5: Solve for x
    x = 8,834.11/98.02
  6. Step 6: Final answer
    x = 90.13

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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.