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Finding the Fourth Proportional to 117,245.67, 161,854.82 and 78,550.12

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Solution

The fourth proportional to 117,245.67, 161,854.82 and 78,550.12 is: 108,436.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,245.67 : 161,854.82 = 78,550.12 : x
  2. Step 2: Convert to fraction form
    117,245.67/161,854.82 = 78,550.12/x
  3. Step 3: Cross multiply
    117,245.67x = 161,854.82 × 78,550.12
  4. Step 4: Simplify right side
    117,245.67x = 12,713,715,533.58
  5. Step 5: Solve for x
    x = 12,713,715,533.58/117,245.67
  6. Step 6: Final answer
    x = 108,436.55

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1.5x scale

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.