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Finding the Fourth Proportional to 99.51, 148.34 and 97.89

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Solution

The fourth proportional to 99.51, 148.34 and 97.89 is: 145.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.51 : 148.34 = 97.89 : x
  2. Step 2: Convert to fraction form
    99.51/148.34 = 97.89/x
  3. Step 3: Cross multiply
    99.51x = 148.34 × 97.89
  4. Step 4: Simplify right side
    99.51x = 14,520.51
  5. Step 5: Solve for x
    x = 14,520.51/99.51
  6. Step 6: Final answer
    x = 145.92

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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.