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Finding the Fourth Proportional to 72,600.63, 100,188.87 and 40,769.55

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Solution

The fourth proportional to 72,600.63, 100,188.87 and 40,769.55 is: 56,261.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,600.63 : 100,188.87 = 40,769.55 : x
  2. Step 2: Convert to fraction form
    72,600.63/100,188.87 = 40,769.55/x
  3. Step 3: Cross multiply
    72,600.63x = 100,188.87 × 40,769.55
  4. Step 4: Simplify right side
    72,600.63x = 4,084,655,144.91
  5. Step 5: Solve for x
    x = 4,084,655,144.91/72,600.63
  6. Step 6: Final answer
    x = 56,261.98

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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.