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Finding the Fourth Proportional to 141.04, 210.98 and 99.91

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Solution

The fourth proportional to 141.04, 210.98 and 99.91 is: 149.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.04 : 210.98 = 99.91 : x
  2. Step 2: Convert to fraction form
    141.04/210.98 = 99.91/x
  3. Step 3: Cross multiply
    141.04x = 210.98 × 99.91
  4. Step 4: Simplify right side
    141.04x = 21,079.01
  5. Step 5: Solve for x
    x = 21,079.01/141.04
  6. Step 6: Final answer
    x = 149.45

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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.