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Finding the Fourth Proportional to 72,673.80, 109,010.70 and 68,785.80

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Solution

The fourth proportional to 72,673.80, 109,010.70 and 68,785.80 is: 103,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,673.80 : 109,010.70 = 68,785.80 : x
  2. Step 2: Convert to fraction form
    72,673.80/109,010.70 = 68,785.80/x
  3. Step 3: Cross multiply
    72,673.80x = 109,010.70 × 68,785.80
  4. Step 4: Simplify right side
    72,673.80x = 7,498,388,208.06
  5. Step 5: Solve for x
    x = 7,498,388,208.06/72,673.80
  6. Step 6: Final answer
    x = 103,178.70

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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.