Home / 72,621.09-100,217.12-40,800.24

Finding the Fourth Proportional to 72,621.09, 100,217.12 and 40,800.24

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Solution

The fourth proportional to 72,621.09, 100,217.12 and 40,800.24 is: 56,304.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,621.09 : 100,217.12 = 40,800.24 : x
  2. Step 2: Convert to fraction form
    72,621.09/100,217.12 = 40,800.24/x
  3. Step 3: Cross multiply
    72,621.09x = 100,217.12 × 40,800.24
  4. Step 4: Simplify right side
    72,621.09x = 4,088,882,344.11
  5. Step 5: Solve for x
    x = 4,088,882,344.11/72,621.09
  6. Step 6: Final answer
    x = 56,304.34

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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.