Home / 72,747.12-109,108.36-20,144.32

Finding the Fourth Proportional to 72,747.12, 109,108.36 and 20,144.32

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Solution

The fourth proportional to 72,747.12, 109,108.36 and 20,144.32 is: 30,213.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,747.12 : 109,108.36 = 20,144.32 : x
  2. Step 2: Convert to fraction form
    72,747.12/109,108.36 = 20,144.32/x
  3. Step 3: Cross multiply
    72,747.12x = 109,108.36 × 20,144.32
  4. Step 4: Simplify right side
    72,747.12x = 2,197,913,718.52
  5. Step 5: Solve for x
    x = 2,197,913,718.52/72,747.12
  6. Step 6: Final answer
    x = 30,213.07

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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.