Home / 72,190.08-99,621.36-40,358.64

Finding the Fourth Proportional to 72,190.08, 99,621.36 and 40,358.64

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Solution

The fourth proportional to 72,190.08, 99,621.36 and 40,358.64 is: 55,694.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,190.08 : 99,621.36 = 40,358.64 : x
  2. Step 2: Convert to fraction form
    72,190.08/99,621.36 = 40,358.64/x
  3. Step 3: Cross multiply
    72,190.08x = 99,621.36 × 40,358.64
  4. Step 4: Simplify right side
    72,190.08x = 4,020,582,604.55
  5. Step 5: Solve for x
    x = 4,020,582,604.55/72,190.08
  6. Step 6: Final answer
    x = 55,694.39

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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.