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Finding the Fourth Proportional to 157.50, 236.40 and 70.88

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Solution

The fourth proportional to 157.50, 236.40 and 70.88 is: 106.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.50 : 236.40 = 70.88 : x
  2. Step 2: Convert to fraction form
    157.50/236.40 = 70.88/x
  3. Step 3: Cross multiply
    157.50x = 236.40 × 70.88
  4. Step 4: Simplify right side
    157.50x = 16,756.03
  5. Step 5: Solve for x
    x = 16,756.03/157.50
  6. Step 6: Final answer
    x = 106.39

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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.