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Finding the Fourth Proportional to 139,722.93, 209,567.07 and 39,891.87

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Solution

The fourth proportional to 139,722.93, 209,567.07 and 39,891.87 is: 59,832.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,722.93 : 209,567.07 = 39,891.87 : x
  2. Step 2: Convert to fraction form
    139,722.93/209,567.07 = 39,891.87/x
  3. Step 3: Cross multiply
    139,722.93x = 209,567.07 × 39,891.87
  4. Step 4: Simplify right side
    139,722.93x = 8,360,022,312.72
  5. Step 5: Solve for x
    x = 8,360,022,312.72/139,722.93
  6. Step 6: Final answer
    x = 59,832.86

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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.