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Finding the Fourth Proportional to 52,639.78, 72,643.92 and 28,767.92

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Solution

The fourth proportional to 52,639.78, 72,643.92 and 28,767.92 is: 39,700.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,639.78 : 72,643.92 = 28,767.92 : x
  2. Step 2: Convert to fraction form
    52,639.78/72,643.92 = 28,767.92/x
  3. Step 3: Cross multiply
    52,639.78x = 72,643.92 × 28,767.92
  4. Step 4: Simplify right side
    52,639.78x = 2,089,814,479.05
  5. Step 5: Solve for x
    x = 2,089,814,479.05/52,639.78
  6. Step 6: Final answer
    x = 39,700.29

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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.