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Finding the Fourth Proportional to 52,790.25, 72,850.86 and 28,917.12

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Solution

The fourth proportional to 52,790.25, 72,850.86 and 28,917.12 is: 39,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,790.25 : 72,850.86 = 28,917.12 : x
  2. Step 2: Convert to fraction form
    52,790.25/72,850.86 = 28,917.12/x
  3. Step 3: Cross multiply
    52,790.25x = 72,850.86 × 28,917.12
  4. Step 4: Simplify right side
    52,790.25x = 2,106,637,060.72
  5. Step 5: Solve for x
    x = 2,106,637,060.72/52,790.25
  6. Step 6: Final answer
    x = 39,905.80

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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.