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Finding the Fourth Proportional to 64,279.40, 96,426.30 and 19,905.80

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Solution

The fourth proportional to 64,279.40, 96,426.30 and 19,905.80 is: 29,860.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,279.40 : 96,426.30 = 19,905.80 : x
  2. Step 2: Convert to fraction form
    64,279.40/96,426.30 = 19,905.80/x
  3. Step 3: Cross multiply
    64,279.40x = 96,426.30 × 19,905.80
  4. Step 4: Simplify right side
    64,279.40x = 1,919,442,642.54
  5. Step 5: Solve for x
    x = 1,919,442,642.54/64,279.40
  6. Step 6: Final answer
    x = 29,860.93

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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.