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Finding the Fourth Proportional to 52,639.92, 72,643.28 and 28,766.96

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Solution

The fourth proportional to 52,639.92, 72,643.28 and 28,766.96 is: 39,698.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,639.92 : 72,643.28 = 28,766.96 : x
  2. Step 2: Convert to fraction form
    52,639.92/72,643.28 = 28,766.96/x
  3. Step 3: Cross multiply
    52,639.92x = 72,643.28 × 28,766.96
  4. Step 4: Simplify right side
    52,639.92x = 2,089,726,330.03
  5. Step 5: Solve for x
    x = 2,089,726,330.03/52,639.92
  6. Step 6: Final answer
    x = 39,698.51

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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.