Home / 109,415.10-164,122.65-91,919.10

Finding the Fourth Proportional to 109,415.10, 164,122.65 and 91,919.10

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Solution

The fourth proportional to 109,415.10, 164,122.65 and 91,919.10 is: 137,878.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,415.10 : 164,122.65 = 91,919.10 : x
  2. Step 2: Convert to fraction form
    109,415.10/164,122.65 = 91,919.10/x
  3. Step 3: Cross multiply
    109,415.10x = 164,122.65 × 91,919.10
  4. Step 4: Simplify right side
    109,415.10x = 15,086,006,277.62
  5. Step 5: Solve for x
    x = 15,086,006,277.62/109,415.10
  6. Step 6: Final answer
    x = 137,878.65

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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.