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Finding the Fourth Proportional to 107.43, 160.13 and 99.63

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Solution

The fourth proportional to 107.43, 160.13 and 99.63 is: 148.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.43 : 160.13 = 99.63 : x
  2. Step 2: Convert to fraction form
    107.43/160.13 = 99.63/x
  3. Step 3: Cross multiply
    107.43x = 160.13 × 99.63
  4. Step 4: Simplify right side
    107.43x = 15,953.25
  5. Step 5: Solve for x
    x = 15,953.25/107.43
  6. Step 6: Final answer
    x = 148.50

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.