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Finding the Fourth Proportional to 139,711.71, 209,565.50 and 34,530.65

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Solution

The fourth proportional to 139,711.71, 209,565.50 and 34,530.65 is: 51,795.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,711.71 : 209,565.50 = 34,530.65 : x
  2. Step 2: Convert to fraction form
    139,711.71/209,565.50 = 34,530.65/x
  3. Step 3: Cross multiply
    139,711.71x = 209,565.50 × 34,530.65
  4. Step 4: Simplify right side
    139,711.71x = 7,236,431,712.09
  5. Step 5: Solve for x
    x = 7,236,431,712.09/139,711.71
  6. Step 6: Final answer
    x = 51,795.46

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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.