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Finding the Fourth Proportional to 117,115.87, 161,619.95 and 63,400.88

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Solution

The fourth proportional to 117,115.87, 161,619.95 and 63,400.88 is: 87,493.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,115.87 : 161,619.95 = 63,400.88 : x
  2. Step 2: Convert to fraction form
    117,115.87/161,619.95 = 63,400.88/x
  3. Step 3: Cross multiply
    117,115.87x = 161,619.95 × 63,400.88
  4. Step 4: Simplify right side
    117,115.87x = 10,246,847,459.61
  5. Step 5: Solve for x
    x = 10,246,847,459.61/117,115.87
  6. Step 6: Final answer
    x = 87,493.25

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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.