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Finding the Fourth Proportional to 139,795.70, 209,693.55 and 69,811.70

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Solution

The fourth proportional to 139,795.70, 209,693.55 and 69,811.70 is: 104,717.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,795.70 : 209,693.55 = 69,811.70 : x
  2. Step 2: Convert to fraction form
    139,795.70/209,693.55 = 69,811.70/x
  3. Step 3: Cross multiply
    139,795.70x = 209,693.55 × 69,811.70
  4. Step 4: Simplify right side
    139,795.70x = 14,639,063,204.54
  5. Step 5: Solve for x
    x = 14,639,063,204.54/139,795.70
  6. Step 6: Final answer
    x = 104,717.55

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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.