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Finding the Fourth Proportional to 139,845.72, 209,774.34 and 73,248.60

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Solution

The fourth proportional to 139,845.72, 209,774.34 and 73,248.60 is: 109,875.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,845.72 : 209,774.34 = 73,248.60 : x
  2. Step 2: Convert to fraction form
    139,845.72/209,774.34 = 73,248.60/x
  3. Step 3: Cross multiply
    139,845.72x = 209,774.34 × 73,248.60
  4. Step 4: Simplify right side
    139,845.72x = 15,365,676,720.92
  5. Step 5: Solve for x
    x = 15,365,676,720.92/139,845.72
  6. Step 6: Final answer
    x = 109,875.92

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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.