Home / 72,189.23-99,621.36-40,358.12

Finding the Fourth Proportional to 72,189.23, 99,621.36 and 40,358.12

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Solution

The fourth proportional to 72,189.23, 99,621.36 and 40,358.12 is: 55,694.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,189.23 : 99,621.36 = 40,358.12 : x
  2. Step 2: Convert to fraction form
    72,189.23/99,621.36 = 40,358.12/x
  3. Step 3: Cross multiply
    72,189.23x = 99,621.36 × 40,358.12
  4. Step 4: Simplify right side
    72,189.23x = 4,020,530,303.34
  5. Step 5: Solve for x
    x = 4,020,530,303.34/72,189.23
  6. Step 6: Final answer
    x = 55,694.33

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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.