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Finding the Fourth Proportional to 113.84, 157.34 and 100.63

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Solution

The fourth proportional to 113.84, 157.34 and 100.63 is: 139.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.84 : 157.34 = 100.63 : x
  2. Step 2: Convert to fraction form
    113.84/157.34 = 100.63/x
  3. Step 3: Cross multiply
    113.84x = 157.34 × 100.63
  4. Step 4: Simplify right side
    113.84x = 15,832.69
  5. Step 5: Solve for x
    x = 15,832.69/113.84
  6. Step 6: Final answer
    x = 139.08

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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.