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Finding the Fourth Proportional to 61.58, 91.94 and 56.45

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Solution

The fourth proportional to 61.58, 91.94 and 56.45 is: 84.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.58 : 91.94 = 56.45 : x
  2. Step 2: Convert to fraction form
    61.58/91.94 = 56.45/x
  3. Step 3: Cross multiply
    61.58x = 91.94 × 56.45
  4. Step 4: Simplify right side
    61.58x = 5,190.01
  5. Step 5: Solve for x
    x = 5,190.01/61.58
  6. Step 6: Final answer
    x = 84.28

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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.