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Finding the Fourth Proportional to 64,768.66, 97,156.46 and 20,398.87

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Solution

The fourth proportional to 64,768.66, 97,156.46 and 20,398.87 is: 30,599.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,768.66 : 97,156.46 = 20,398.87 : x
  2. Step 2: Convert to fraction form
    64,768.66/97,156.46 = 20,398.87/x
  3. Step 3: Cross multiply
    64,768.66x = 97,156.46 × 20,398.87
  4. Step 4: Simplify right side
    64,768.66x = 1,981,881,997.20
  5. Step 5: Solve for x
    x = 1,981,881,997.20/64,768.66
  6. Step 6: Final answer
    x = 30,599.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.