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Finding the Fourth Proportional to 64,364.40, 96,553.80 and 19,990.80

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Solution

The fourth proportional to 64,364.40, 96,553.80 and 19,990.80 is: 29,988.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,364.40 : 96,553.80 = 19,990.80 : x
  2. Step 2: Convert to fraction form
    64,364.40/96,553.80 = 19,990.80/x
  3. Step 3: Cross multiply
    64,364.40x = 96,553.80 × 19,990.80
  4. Step 4: Simplify right side
    64,364.40x = 1,930,187,705.04
  5. Step 5: Solve for x
    x = 1,930,187,705.04/64,364.40
  6. Step 6: Final answer
    x = 29,988.44

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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.