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Finding the Fourth Proportional to 72,573.89, 100,156.88 and 54,640.49

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Solution

The fourth proportional to 72,573.89, 100,156.88 and 54,640.49 is: 75,407.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,573.89 : 100,156.88 = 54,640.49 : x
  2. Step 2: Convert to fraction form
    72,573.89/100,156.88 = 54,640.49/x
  3. Step 3: Cross multiply
    72,573.89x = 100,156.88 × 54,640.49
  4. Step 4: Simplify right side
    72,573.89x = 5,472,620,226.08
  5. Step 5: Solve for x
    x = 5,472,620,226.08/72,573.89
  6. Step 6: Final answer
    x = 75,407.57

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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.