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Finding the Fourth Proportional to 72,805.64, 109,068.39 and 44,643.49

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Solution

The fourth proportional to 72,805.64, 109,068.39 and 44,643.49 is: 66,879.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,805.64 : 109,068.39 = 44,643.49 : x
  2. Step 2: Convert to fraction form
    72,805.64/109,068.39 = 44,643.49/x
  3. Step 3: Cross multiply
    72,805.64x = 109,068.39 × 44,643.49
  4. Step 4: Simplify right side
    72,805.64x = 4,869,193,305.61
  5. Step 5: Solve for x
    x = 4,869,193,305.61/72,805.64
  6. Step 6: Final answer
    x = 66,879.35

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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.