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Finding the Fourth Proportional to 88.93, 122.76 and 57.90

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Solution

The fourth proportional to 88.93, 122.76 and 57.90 is: 79.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.93 : 122.76 = 57.90 : x
  2. Step 2: Convert to fraction form
    88.93/122.76 = 57.90/x
  3. Step 3: Cross multiply
    88.93x = 122.76 × 57.90
  4. Step 4: Simplify right side
    88.93x = 7,107.51
  5. Step 5: Solve for x
    x = 7,107.51/88.93
  6. Step 6: Final answer
    x = 79.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.