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Finding the Fourth Proportional to 117,891.47, 162,642.15 and 72,555.77

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Solution

The fourth proportional to 117,891.47, 162,642.15 and 72,555.77 is: 100,097.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,891.47 : 162,642.15 = 72,555.77 : x
  2. Step 2: Convert to fraction form
    117,891.47/162,642.15 = 72,555.77/x
  3. Step 3: Cross multiply
    117,891.47x = 162,642.15 × 72,555.77
  4. Step 4: Simplify right side
    117,891.47x = 11,800,625,614.49
  5. Step 5: Solve for x
    x = 11,800,625,614.49/117,891.47
  6. Step 6: Final answer
    x = 100,097.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.