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Finding the Fourth Proportional to 72,604.20, 100,190.64 and 42,391.20

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Solution

The fourth proportional to 72,604.20, 100,190.64 and 42,391.20 is: 58,498.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,604.20 : 100,190.64 = 42,391.20 : x
  2. Step 2: Convert to fraction form
    72,604.20/100,190.64 = 42,391.20/x
  3. Step 3: Cross multiply
    72,604.20x = 100,190.64 × 42,391.20
  4. Step 4: Simplify right side
    72,604.20x = 4,247,201,458.37
  5. Step 5: Solve for x
    x = 4,247,201,458.37/72,604.20
  6. Step 6: Final answer
    x = 58,498.01

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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.