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Finding the Fourth Proportional to 152.69, 210.59 and 100.14

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Solution

The fourth proportional to 152.69, 210.59 and 100.14 is: 138.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.69 : 210.59 = 100.14 : x
  2. Step 2: Convert to fraction form
    152.69/210.59 = 100.14/x
  3. Step 3: Cross multiply
    152.69x = 210.59 × 100.14
  4. Step 4: Simplify right side
    152.69x = 21,087.98
  5. Step 5: Solve for x
    x = 21,087.98/152.69
  6. Step 6: Final answer
    x = 138.11

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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.