Home / 103,617.70-155,426.55-81,067.30

Finding the Fourth Proportional to 103,617.70, 155,426.55 and 81,067.30

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Solution

The fourth proportional to 103,617.70, 155,426.55 and 81,067.30 is: 121,600.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,617.70 : 155,426.55 = 81,067.30 : x
  2. Step 2: Convert to fraction form
    103,617.70/155,426.55 = 81,067.30/x
  3. Step 3: Cross multiply
    103,617.70x = 155,426.55 × 81,067.30
  4. Step 4: Simplify right side
    103,617.70x = 12,600,010,756.82
  5. Step 5: Solve for x
    x = 12,600,010,756.82/103,617.70
  6. Step 6: Final answer
    x = 121,600.95

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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.