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Finding the Fourth Proportional to 113.86, 157.09 and 64.06

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Solution

The fourth proportional to 113.86, 157.09 and 64.06 is: 88.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.86 : 157.09 = 64.06 : x
  2. Step 2: Convert to fraction form
    113.86/157.09 = 64.06/x
  3. Step 3: Cross multiply
    113.86x = 157.09 × 64.06
  4. Step 4: Simplify right side
    113.86x = 10,062.63
  5. Step 5: Solve for x
    x = 10,062.63/113.86
  6. Step 6: Final answer
    x = 88.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.