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Finding the Fourth Proportional to 70.37, 96.93 and 64.55

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Solution

The fourth proportional to 70.37, 96.93 and 64.55 is: 88.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.37 : 96.93 = 64.55 : x
  2. Step 2: Convert to fraction form
    70.37/96.93 = 64.55/x
  3. Step 3: Cross multiply
    70.37x = 96.93 × 64.55
  4. Step 4: Simplify right side
    70.37x = 6,256.80
  5. Step 5: Solve for x
    x = 6,256.80/70.37
  6. Step 6: Final answer
    x = 88.91

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Why These Related Problems?

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