Home / 79,622.09-109,889.16-72,895.65

Finding the Fourth Proportional to 79,622.09, 109,889.16 and 72,895.65

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Solution

The fourth proportional to 79,622.09, 109,889.16 and 72,895.65 is: 100,605.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,622.09 : 109,889.16 = 72,895.65 : x
  2. Step 2: Convert to fraction form
    79,622.09/109,889.16 = 72,895.65/x
  3. Step 3: Cross multiply
    79,622.09x = 109,889.16 × 72,895.65
  4. Step 4: Simplify right side
    79,622.09x = 8,010,441,060.71
  5. Step 5: Solve for x
    x = 8,010,441,060.71/79,622.09
  6. Step 6: Final answer
    x = 100,605.76

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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.