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Finding the Fourth Proportional to 157.13, 235.69 and 43.13

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Solution

The fourth proportional to 157.13, 235.69 and 43.13 is: 64.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.13 : 235.69 = 43.13 : x
  2. Step 2: Convert to fraction form
    157.13/235.69 = 43.13/x
  3. Step 3: Cross multiply
    157.13x = 235.69 × 43.13
  4. Step 4: Simplify right side
    157.13x = 10,164.02
  5. Step 5: Solve for x
    x = 10,164.02/157.13
  6. Step 6: Final answer
    x = 64.69

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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.