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Finding the Fourth Proportional to 70.47, 96.93 and 59.40

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Solution

The fourth proportional to 70.47, 96.93 and 59.40 is: 81.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.47 : 96.93 = 59.40 : x
  2. Step 2: Convert to fraction form
    70.47/96.93 = 59.40/x
  3. Step 3: Cross multiply
    70.47x = 96.93 × 59.40
  4. Step 4: Simplify right side
    70.47x = 5,757.64
  5. Step 5: Solve for x
    x = 5,757.64/70.47
  6. Step 6: Final answer
    x = 81.70

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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.