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Finding the Fourth Proportional to 114.65, 158.15 and 70.38

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Solution

The fourth proportional to 114.65, 158.15 and 70.38 is: 97.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.65 : 158.15 = 70.38 : x
  2. Step 2: Convert to fraction form
    114.65/158.15 = 70.38/x
  3. Step 3: Cross multiply
    114.65x = 158.15 × 70.38
  4. Step 4: Simplify right side
    114.65x = 11,130.25
  5. Step 5: Solve for x
    x = 11,130.25/114.65
  6. Step 6: Final answer
    x = 97.08

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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.