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Finding the Fourth Proportional to 139,572.72, 209,359.08 and 34,391.70

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Solution

The fourth proportional to 139,572.72, 209,359.08 and 34,391.70 is: 51,587.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,572.72 : 209,359.08 = 34,391.70 : x
  2. Step 2: Convert to fraction form
    139,572.72/209,359.08 = 34,391.70/x
  3. Step 3: Cross multiply
    139,572.72x = 209,359.08 × 34,391.70
  4. Step 4: Simplify right side
    139,572.72x = 7,200,214,671.64
  5. Step 5: Solve for x
    x = 7,200,214,671.64/139,572.72
  6. Step 6: Final answer
    x = 51,587.55

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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.