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Finding the Fourth Proportional to 117,245.77, 161,854.93 and 78,550.21

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Solution

The fourth proportional to 117,245.77, 161,854.93 and 78,550.21 is: 108,436.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,245.77 : 161,854.93 = 78,550.21 : x
  2. Step 2: Convert to fraction form
    117,245.77/161,854.93 = 78,550.21/x
  3. Step 3: Cross multiply
    117,245.77x = 161,854.93 × 78,550.21
  4. Step 4: Simplify right side
    117,245.77x = 12,713,739,041.54
  5. Step 5: Solve for x
    x = 12,713,739,041.54/117,245.77
  6. Step 6: Final answer
    x = 108,436.66

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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.