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Finding the Fourth Proportional to 121,870.26, 181,995.60 and 120,550.77

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Solution

The fourth proportional to 121,870.26, 181,995.60 and 120,550.77 is: 180,025.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,870.26 : 181,995.60 = 120,550.77 : x
  2. Step 2: Convert to fraction form
    121,870.26/181,995.60 = 120,550.77/x
  3. Step 3: Cross multiply
    121,870.26x = 181,995.60 × 120,550.77
  4. Step 4: Simplify right side
    121,870.26x = 21,939,709,716.61
  5. Step 5: Solve for x
    x = 21,939,709,716.61/121,870.26
  6. Step 6: Final answer
    x = 180,025.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.