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Finding the Fourth Proportional to 100.94, 149.52 and 99.86

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Solution

The fourth proportional to 100.94, 149.52 and 99.86 is: 147.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.94 : 149.52 = 99.86 : x
  2. Step 2: Convert to fraction form
    100.94/149.52 = 99.86/x
  3. Step 3: Cross multiply
    100.94x = 149.52 × 99.86
  4. Step 4: Simplify right side
    100.94x = 14,931.07
  5. Step 5: Solve for x
    x = 14,931.07/100.94
  6. Step 6: Final answer
    x = 147.92

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.