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Finding the Fourth Proportional to 158.40, 237.50 and 77.14

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Solution

The fourth proportional to 158.40, 237.50 and 77.14 is: 115.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.40 : 237.50 = 77.14 : x
  2. Step 2: Convert to fraction form
    158.40/237.50 = 77.14/x
  3. Step 3: Cross multiply
    158.40x = 237.50 × 77.14
  4. Step 4: Simplify right side
    158.40x = 18,319.76
  5. Step 5: Solve for x
    x = 18,319.76/158.40
  6. Step 6: Final answer
    x = 115.66

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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.