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Finding the Fourth Proportional to 64.45, 88.87 and 42.59

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Solution

The fourth proportional to 64.45, 88.87 and 42.59 is: 58.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.45 : 88.87 = 42.59 : x
  2. Step 2: Convert to fraction form
    64.45/88.87 = 42.59/x
  3. Step 3: Cross multiply
    64.45x = 88.87 × 42.59
  4. Step 4: Simplify right side
    64.45x = 3,784.76
  5. Step 5: Solve for x
    x = 3,784.76/64.45
  6. Step 6: Final answer
    x = 58.72

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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.