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Finding the Fourth Proportional to 158.30, 237.51 and 86.06

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Solution

The fourth proportional to 158.30, 237.51 and 86.06 is: 129.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.30 : 237.51 = 86.06 : x
  2. Step 2: Convert to fraction form
    158.30/237.51 = 86.06/x
  3. Step 3: Cross multiply
    158.30x = 237.51 × 86.06
  4. Step 4: Simplify right side
    158.30x = 20,440.11
  5. Step 5: Solve for x
    x = 20,440.11/158.30
  6. Step 6: Final answer
    x = 129.12

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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.