Home / 75,618.80-113,428.20-51,999.20

Finding the Fourth Proportional to 75,618.80, 113,428.20 and 51,999.20

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Solution

The fourth proportional to 75,618.80, 113,428.20 and 51,999.20 is: 77,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,618.80 : 113,428.20 = 51,999.20 : x
  2. Step 2: Convert to fraction form
    75,618.80/113,428.20 = 51,999.20/x
  3. Step 3: Cross multiply
    75,618.80x = 113,428.20 × 51,999.20
  4. Step 4: Simplify right side
    75,618.80x = 5,898,175,657.44
  5. Step 5: Solve for x
    x = 5,898,175,657.44/75,618.80
  6. Step 6: Final answer
    x = 77,998.80

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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.