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Finding the Fourth Proportional to 73,116.80, 109,718.40 and 53,345.60

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Solution

The fourth proportional to 73,116.80, 109,718.40 and 53,345.60 is: 80,049.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,116.80 : 109,718.40 = 53,345.60 : x
  2. Step 2: Convert to fraction form
    73,116.80/109,718.40 = 53,345.60/x
  3. Step 3: Cross multiply
    73,116.80x = 109,718.40 × 53,345.60
  4. Step 4: Simplify right side
    73,116.80x = 5,852,993,879.04
  5. Step 5: Solve for x
    x = 5,852,993,879.04/73,116.80
  6. Step 6: Final answer
    x = 80,049.92

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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.