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Finding the Fourth Proportional to 139,656.08, 209,409.60 and 72,934.76

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Solution

The fourth proportional to 139,656.08, 209,409.60 and 72,934.76 is: 109,363.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,656.08 : 209,409.60 = 72,934.76 : x
  2. Step 2: Convert to fraction form
    139,656.08/209,409.60 = 72,934.76/x
  3. Step 3: Cross multiply
    139,656.08x = 209,409.60 × 72,934.76
  4. Step 4: Simplify right side
    139,656.08x = 15,273,238,917.70
  5. Step 5: Solve for x
    x = 15,273,238,917.70/139,656.08
  6. Step 6: Final answer
    x = 109,363.22

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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.