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Finding the Fourth Proportional to 72,425.46, 99,942.98 and 40,157.48

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Solution

The fourth proportional to 72,425.46, 99,942.98 and 40,157.48 is: 55,415.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,425.46 : 99,942.98 = 40,157.48 : x
  2. Step 2: Convert to fraction form
    72,425.46/99,942.98 = 40,157.48/x
  3. Step 3: Cross multiply
    72,425.46x = 99,942.98 × 40,157.48
  4. Step 4: Simplify right side
    72,425.46x = 4,013,458,220.49
  5. Step 5: Solve for x
    x = 4,013,458,220.49/72,425.46
  6. Step 6: Final answer
    x = 55,415.02

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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.