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Finding the Fourth Proportional to 61, 91 and 55.93

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Solution

The fourth proportional to 61, 91 and 55.93 is: 83.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    61 : 91 = 55.93 : x
  2. Step 2: Convert to fraction form
    61/91 = 55.93/x
  3. Step 3: Cross multiply
    61x = 91 × 55.93
  4. Step 4: Simplify right side
    61x = 5,089.63
  5. Step 5: Solve for x
    x = 5,089.63/61
  6. Step 6: Final answer
    x = 83.44

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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.