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Finding the Fourth Proportional to 140.04, 192.96 and 98.40

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Solution

The fourth proportional to 140.04, 192.96 and 98.40 is: 135.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.04 : 192.96 = 98.40 : x
  2. Step 2: Convert to fraction form
    140.04/192.96 = 98.40/x
  3. Step 3: Cross multiply
    140.04x = 192.96 × 98.40
  4. Step 4: Simplify right side
    140.04x = 18,987.26
  5. Step 5: Solve for x
    x = 18,987.26/140.04
  6. Step 6: Final answer
    x = 135.58

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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.