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Finding the Fourth Proportional to 72,612.62, 100,200.48 and 40,784.48

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Solution

The fourth proportional to 72,612.62, 100,200.48 and 40,784.48 is: 56,279.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612.62 : 100,200.48 = 40,784.48 : x
  2. Step 2: Convert to fraction form
    72,612.62/100,200.48 = 40,784.48/x
  3. Step 3: Cross multiply
    72,612.62x = 100,200.48 × 40,784.48
  4. Step 4: Simplify right side
    72,612.62x = 4,086,624,472.55
  5. Step 5: Solve for x
    x = 4,086,624,472.55/72,612.62
  6. Step 6: Final answer
    x = 56,279.81

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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.