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Finding the Fourth Proportional to 72,777.20, 100,424.40 and 40,945.44

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Solution

The fourth proportional to 72,777.20, 100,424.40 and 40,945.44 is: 56,500.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,777.20 : 100,424.40 = 40,945.44 : x
  2. Step 2: Convert to fraction form
    72,777.20/100,424.40 = 40,945.44/x
  3. Step 3: Cross multiply
    72,777.20x = 100,424.40 × 40,945.44
  4. Step 4: Simplify right side
    72,777.20x = 4,111,921,244.74
  5. Step 5: Solve for x
    x = 4,111,921,244.74/72,777.20
  6. Step 6: Final answer
    x = 56,500.13

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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.