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Finding the Fourth Proportional to 139,785.42, 209,710.92 and 46,291.20

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Solution

The fourth proportional to 139,785.42, 209,710.92 and 46,291.20 is: 69,447.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,785.42 : 209,710.92 = 46,291.20 : x
  2. Step 2: Convert to fraction form
    139,785.42/209,710.92 = 46,291.20/x
  3. Step 3: Cross multiply
    139,785.42x = 209,710.92 × 46,291.20
  4. Step 4: Simplify right side
    139,785.42x = 9,707,770,139.90
  5. Step 5: Solve for x
    x = 9,707,770,139.90/139,785.42
  6. Step 6: Final answer
    x = 69,447.66

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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.