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Finding the Fourth Proportional to 135.04, 202.48 and 78.08

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Solution

The fourth proportional to 135.04, 202.48 and 78.08 is: 117.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.04 : 202.48 = 78.08 : x
  2. Step 2: Convert to fraction form
    135.04/202.48 = 78.08/x
  3. Step 3: Cross multiply
    135.04x = 202.48 × 78.08
  4. Step 4: Simplify right side
    135.04x = 15,809.64
  5. Step 5: Solve for x
    x = 15,809.64/135.04
  6. Step 6: Final answer
    x = 117.07

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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.