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Finding the Fourth Proportional to 72,857.28, 100,550.28 and 42,640.80

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Solution

The fourth proportional to 72,857.28, 100,550.28 and 42,640.80 is: 58,848.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,857.28 : 100,550.28 = 42,640.80 : x
  2. Step 2: Convert to fraction form
    72,857.28/100,550.28 = 42,640.80/x
  3. Step 3: Cross multiply
    72,857.28x = 100,550.28 × 42,640.80
  4. Step 4: Simplify right side
    72,857.28x = 4,287,544,379.42
  5. Step 5: Solve for x
    x = 4,287,544,379.42/72,857.28
  6. Step 6: Final answer
    x = 58,848.54

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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.