Home / 72,039.08-99,410.28-40,212.56

Finding the Fourth Proportional to 72,039.08, 99,410.28 and 40,212.56

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Solution

The fourth proportional to 72,039.08, 99,410.28 and 40,212.56 is: 55,491.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,039.08 : 99,410.28 = 40,212.56 : x
  2. Step 2: Convert to fraction form
    72,039.08/99,410.28 = 40,212.56/x
  3. Step 3: Cross multiply
    72,039.08x = 99,410.28 × 40,212.56
  4. Step 4: Simplify right side
    72,039.08x = 3,997,541,849.12
  5. Step 5: Solve for x
    x = 3,997,541,849.12/72,039.08
  6. Step 6: Final answer
    x = 55,491.30

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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.