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Finding the Fourth Proportional to 64,939.48, 97,423.98 and 20,569

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Solution

The fourth proportional to 64,939.48, 97,423.98 and 20,569 is: 30,858.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,939.48 : 97,423.98 = 20,569 : x
  2. Step 2: Convert to fraction form
    64,939.48/97,423.98 = 20,569/x
  3. Step 3: Cross multiply
    64,939.48x = 97,423.98 × 20,569
  4. Step 4: Simplify right side
    64,939.48x = 2,003,913,844.62
  5. Step 5: Solve for x
    x = 2,003,913,844.62/64,939.48
  6. Step 6: Final answer
    x = 30,858.18

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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.