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Finding the Fourth Proportional to 133,269.79, 199,875.21 and 38,479.40

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Solution

The fourth proportional to 133,269.79, 199,875.21 and 38,479.40 is: 57,710.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,269.79 : 199,875.21 = 38,479.40 : x
  2. Step 2: Convert to fraction form
    133,269.79/199,875.21 = 38,479.40/x
  3. Step 3: Cross multiply
    133,269.79x = 199,875.21 × 38,479.40
  4. Step 4: Simplify right side
    133,269.79x = 7,691,078,905.21
  5. Step 5: Solve for x
    x = 7,691,078,905.21/133,269.79
  6. Step 6: Final answer
    x = 57,710.59

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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.