Home / 120,756.36-181,167.35-85,917.45

Finding the Fourth Proportional to 120,756.36, 181,167.35 and 85,917.45

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Solution

The fourth proportional to 120,756.36, 181,167.35 and 85,917.45 is: 128,899.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,756.36 : 181,167.35 = 85,917.45 : x
  2. Step 2: Convert to fraction form
    120,756.36/181,167.35 = 85,917.45/x
  3. Step 3: Cross multiply
    120,756.36x = 181,167.35 × 85,917.45
  4. Step 4: Simplify right side
    120,756.36x = 15,565,436,305.67
  5. Step 5: Solve for x
    x = 15,565,436,305.67/120,756.36
  6. Step 6: Final answer
    x = 128,899.52

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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.