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Finding the Fourth Proportional to 52,638.78, 72,642.54 and 28,766.92

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Solution

The fourth proportional to 52,638.78, 72,642.54 and 28,766.92 is: 39,698.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,638.78 : 72,642.54 = 28,766.92 : x
  2. Step 2: Convert to fraction form
    52,638.78/72,642.54 = 28,766.92/x
  3. Step 3: Cross multiply
    52,638.78x = 72,642.54 × 28,766.92
  4. Step 4: Simplify right side
    52,638.78x = 2,089,702,136.78
  5. Step 5: Solve for x
    x = 2,089,702,136.78/52,638.78
  6. Step 6: Final answer
    x = 39,698.91

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1.5x scale

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.