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Finding the Fourth Proportional to 47.55, 70.85 and 45.37

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Solution

The fourth proportional to 47.55, 70.85 and 45.37 is: 67.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.55 : 70.85 = 45.37 : x
  2. Step 2: Convert to fraction form
    47.55/70.85 = 45.37/x
  3. Step 3: Cross multiply
    47.55x = 70.85 × 45.37
  4. Step 4: Simplify right side
    47.55x = 3,214.58
  5. Step 5: Solve for x
    x = 3,214.58/47.55
  6. Step 6: Final answer
    x = 67.60

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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.