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Finding the Fourth Proportional to 158.90, 238.09 and 56.13

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Solution

The fourth proportional to 158.90, 238.09 and 56.13 is: 84.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.90 : 238.09 = 56.13 : x
  2. Step 2: Convert to fraction form
    158.90/238.09 = 56.13/x
  3. Step 3: Cross multiply
    158.90x = 238.09 × 56.13
  4. Step 4: Simplify right side
    158.90x = 13,363.99
  5. Step 5: Solve for x
    x = 13,363.99/158.90
  6. Step 6: Final answer
    x = 84.10

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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.