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Finding the Fourth Proportional to 62.07, 85.76 and 53.87

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Solution

The fourth proportional to 62.07, 85.76 and 53.87 is: 74.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.07 : 85.76 = 53.87 : x
  2. Step 2: Convert to fraction form
    62.07/85.76 = 53.87/x
  3. Step 3: Cross multiply
    62.07x = 85.76 × 53.87
  4. Step 4: Simplify right side
    62.07x = 4,619.40
  5. Step 5: Solve for x
    x = 4,619.40/62.07
  6. Step 6: Final answer
    x = 74.43

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