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Finding the Fourth Proportional to 52,640.44, 72,641.74 and 28,767.40

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Solution

The fourth proportional to 52,640.44, 72,641.74 and 28,767.40 is: 39,697.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,640.44 : 72,641.74 = 28,767.40 : x
  2. Step 2: Convert to fraction form
    52,640.44/72,641.74 = 28,767.40/x
  3. Step 3: Cross multiply
    52,640.44x = 72,641.74 × 28,767.40
  4. Step 4: Simplify right side
    52,640.44x = 2,089,713,991.28
  5. Step 5: Solve for x
    x = 2,089,713,991.28/52,640.44
  6. Step 6: Final answer
    x = 39,697.88

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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.