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Finding the Fourth Proportional to 155.77, 233.65 and 74.36

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Solution

The fourth proportional to 155.77, 233.65 and 74.36 is: 111.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.77 : 233.65 = 74.36 : x
  2. Step 2: Convert to fraction form
    155.77/233.65 = 74.36/x
  3. Step 3: Cross multiply
    155.77x = 233.65 × 74.36
  4. Step 4: Simplify right side
    155.77x = 17,374.61
  5. Step 5: Solve for x
    x = 17,374.61/155.77
  6. Step 6: Final answer
    x = 111.54

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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.