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Finding the Fourth Proportional to 139,746.30, 209,600.55 and 55,568.40

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Solution

The fourth proportional to 139,746.30, 209,600.55 and 55,568.40 is: 83,345.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,746.30 : 209,600.55 = 55,568.40 : x
  2. Step 2: Convert to fraction form
    139,746.30/209,600.55 = 55,568.40/x
  3. Step 3: Cross multiply
    139,746.30x = 209,600.55 × 55,568.40
  4. Step 4: Simplify right side
    139,746.30x = 11,647,167,202.62
  5. Step 5: Solve for x
    x = 11,647,167,202.62/139,746.30
  6. Step 6: Final answer
    x = 83,345.08

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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.