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Finding the Fourth Proportional to 139,564.60, 209,444.10 and 89,765.80

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Solution

The fourth proportional to 139,564.60, 209,444.10 and 89,765.80 is: 134,711.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,564.60 : 209,444.10 = 89,765.80 : x
  2. Step 2: Convert to fraction form
    139,564.60/209,444.10 = 89,765.80/x
  3. Step 3: Cross multiply
    139,564.60x = 209,444.10 × 89,765.80
  4. Step 4: Simplify right side
    139,564.60x = 18,800,917,191.78
  5. Step 5: Solve for x
    x = 18,800,917,191.78/139,564.60
  6. Step 6: Final answer
    x = 134,711.22

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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.