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Finding the Fourth Proportional to 157.39, 235.89 and 70.61

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Solution

The fourth proportional to 157.39, 235.89 and 70.61 is: 105.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.39 : 235.89 = 70.61 : x
  2. Step 2: Convert to fraction form
    157.39/235.89 = 70.61/x
  3. Step 3: Cross multiply
    157.39x = 235.89 × 70.61
  4. Step 4: Simplify right side
    157.39x = 16,655.01
  5. Step 5: Solve for x
    x = 16,655.01/157.39
  6. Step 6: Final answer
    x = 105.82

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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.