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Finding the Fourth Proportional to 72,077.54, 99,471.90 and 40,245.74

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Solution

The fourth proportional to 72,077.54, 99,471.90 and 40,245.74 is: 55,541.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,077.54 : 99,471.90 = 40,245.74 : x
  2. Step 2: Convert to fraction form
    72,077.54/99,471.90 = 40,245.74/x
  3. Step 3: Cross multiply
    72,077.54x = 99,471.90 × 40,245.74
  4. Step 4: Simplify right side
    72,077.54x = 4,003,320,224.71
  5. Step 5: Solve for x
    x = 4,003,320,224.71/72,077.54
  6. Step 6: Final answer
    x = 55,541.85

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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.