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Finding the Fourth Proportional to 66.93, 99.90 and 58.83

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Solution

The fourth proportional to 66.93, 99.90 and 58.83 is: 87.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.93 : 99.90 = 58.83 : x
  2. Step 2: Convert to fraction form
    66.93/99.90 = 58.83/x
  3. Step 3: Cross multiply
    66.93x = 99.90 × 58.83
  4. Step 4: Simplify right side
    66.93x = 5,877.12
  5. Step 5: Solve for x
    x = 5,877.12/66.93
  6. Step 6: Final answer
    x = 87.81

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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.