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Finding the Fourth Proportional to 139,355.64, 209,180.88 and 86,801.22

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Solution

The fourth proportional to 139,355.64, 209,180.88 and 86,801.22 is: 130,293.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,355.64 : 209,180.88 = 86,801.22 : x
  2. Step 2: Convert to fraction form
    139,355.64/209,180.88 = 86,801.22/x
  3. Step 3: Cross multiply
    139,355.64x = 209,180.88 × 86,801.22
  4. Step 4: Simplify right side
    139,355.64x = 18,157,155,584.67
  5. Step 5: Solve for x
    x = 18,157,155,584.67/139,355.64
  6. Step 6: Final answer
    x = 130,293.65

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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.