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Finding the Fourth Proportional to 116.04, 159.68 and 100.45

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Solution

The fourth proportional to 116.04, 159.68 and 100.45 is: 138.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.04 : 159.68 = 100.45 : x
  2. Step 2: Convert to fraction form
    116.04/159.68 = 100.45/x
  3. Step 3: Cross multiply
    116.04x = 159.68 × 100.45
  4. Step 4: Simplify right side
    116.04x = 16,039.71
  5. Step 5: Solve for x
    x = 16,039.71/116.04
  6. Step 6: Final answer
    x = 138.23

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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.