Home / 72,940.12-109,428.63-20,349.56

Finding the Fourth Proportional to 72,940.12, 109,428.63 and 20,349.56

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Solution

The fourth proportional to 72,940.12, 109,428.63 and 20,349.56 is: 30,529.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,940.12 : 109,428.63 = 20,349.56 : x
  2. Step 2: Convert to fraction form
    72,940.12/109,428.63 = 20,349.56/x
  3. Step 3: Cross multiply
    72,940.12x = 109,428.63 × 20,349.56
  4. Step 4: Simplify right side
    72,940.12x = 2,226,824,370.16
  5. Step 5: Solve for x
    x = 2,226,824,370.16/72,940.12
  6. Step 6: Final answer
    x = 30,529.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.