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Finding the Fourth Proportional to 70,768.72, 97,658.82 and 38,937.64

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Solution

The fourth proportional to 70,768.72, 97,658.82 and 38,937.64 is: 53,732.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,768.72 : 97,658.82 = 38,937.64 : x
  2. Step 2: Convert to fraction form
    70,768.72/97,658.82 = 38,937.64/x
  3. Step 3: Cross multiply
    70,768.72x = 97,658.82 × 38,937.64
  4. Step 4: Simplify right side
    70,768.72x = 3,802,603,975.98
  5. Step 5: Solve for x
    x = 3,802,603,975.98/70,768.72
  6. Step 6: Final answer
    x = 53,732.84

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1.5x scale

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.