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Finding the Fourth Proportional to 72,995.94, 109,618.92 and 45,081.18

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Solution

The fourth proportional to 72,995.94, 109,618.92 and 45,081.18 is: 67,698.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,995.94 : 109,618.92 = 45,081.18 : x
  2. Step 2: Convert to fraction form
    72,995.94/109,618.92 = 45,081.18/x
  3. Step 3: Cross multiply
    72,995.94x = 109,618.92 × 45,081.18
  4. Step 4: Simplify right side
    72,995.94x = 4,941,750,263.93
  5. Step 5: Solve for x
    x = 4,941,750,263.93/72,995.94
  6. Step 6: Final answer
    x = 67,698.97

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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.