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Finding the Fourth Proportional to 106.04, 159.04 and 78.66

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Solution

The fourth proportional to 106.04, 159.04 and 78.66 is: 117.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.04 : 159.04 = 78.66 : x
  2. Step 2: Convert to fraction form
    106.04/159.04 = 78.66/x
  3. Step 3: Cross multiply
    106.04x = 159.04 × 78.66
  4. Step 4: Simplify right side
    106.04x = 12,509.59
  5. Step 5: Solve for x
    x = 12,509.59/106.04
  6. Step 6: Final answer
    x = 117.97

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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.