Home / 137,905.47-207,169.61-81,782.39

Finding the Fourth Proportional to 137,905.47, 207,169.61 and 81,782.39

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Solution

The fourth proportional to 137,905.47, 207,169.61 and 81,782.39 is: 122,858.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,905.47 : 207,169.61 = 81,782.39 : x
  2. Step 2: Convert to fraction form
    137,905.47/207,169.61 = 81,782.39/x
  3. Step 3: Cross multiply
    137,905.47x = 207,169.61 × 81,782.39
  4. Step 4: Simplify right side
    137,905.47x = 16,942,825,636.71
  5. Step 5: Solve for x
    x = 16,942,825,636.71/137,905.47
  6. Step 6: Final answer
    x = 122,858.26

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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.