Home / 99,198.12-136,917-56,781.12

Finding the Fourth Proportional to 99,198.12, 136,917 and 56,781.12

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Solution

The fourth proportional to 99,198.12, 136,917 and 56,781.12 is: 78,371.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,198.12 : 136,917 = 56,781.12 : x
  2. Step 2: Convert to fraction form
    99,198.12/136,917 = 56,781.12/x
  3. Step 3: Cross multiply
    99,198.12x = 136,917 × 56,781.12
  4. Step 4: Simplify right side
    99,198.12x = 7,774,300,607.04
  5. Step 5: Solve for x
    x = 7,774,300,607.04/99,198.12
  6. Step 6: Final answer
    x = 78,371.45

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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.