Home / 120,918.40-181,377.60-89,814.40

Finding the Fourth Proportional to 120,918.40, 181,377.60 and 89,814.40

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Solution

The fourth proportional to 120,918.40, 181,377.60 and 89,814.40 is: 134,721.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,918.40 : 181,377.60 = 89,814.40 : x
  2. Step 2: Convert to fraction form
    120,918.40/181,377.60 = 89,814.40/x
  3. Step 3: Cross multiply
    120,918.40x = 181,377.60 × 89,814.40
  4. Step 4: Simplify right side
    120,918.40x = 16,290,320,317.44
  5. Step 5: Solve for x
    x = 16,290,320,317.44/120,918.40
  6. Step 6: Final answer
    x = 134,721.60

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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.