Home / 120,688.20-181,118.70-68,041.80

Finding the Fourth Proportional to 120,688.20, 181,118.70 and 68,041.80

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Solution

The fourth proportional to 120,688.20, 181,118.70 and 68,041.80 is: 102,111.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,688.20 : 181,118.70 = 68,041.80 : x
  2. Step 2: Convert to fraction form
    120,688.20/181,118.70 = 68,041.80/x
  3. Step 3: Cross multiply
    120,688.20x = 181,118.70 × 68,041.80
  4. Step 4: Simplify right side
    120,688.20x = 12,323,642,361.66
  5. Step 5: Solve for x
    x = 12,323,642,361.66/120,688.20
  6. Step 6: Final answer
    x = 102,111.41

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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.