Home / 121,285.40-181,928.10-120,507.80

Finding the Fourth Proportional to 121,285.40, 181,928.10 and 120,507.80

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Solution

The fourth proportional to 121,285.40, 181,928.10 and 120,507.80 is: 180,761.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,285.40 : 181,928.10 = 120,507.80 : x
  2. Step 2: Convert to fraction form
    121,285.40/181,928.10 = 120,507.80/x
  3. Step 3: Cross multiply
    121,285.40x = 181,928.10 × 120,507.80
  4. Step 4: Simplify right side
    121,285.40x = 21,923,755,089.18
  5. Step 5: Solve for x
    x = 21,923,755,089.18/121,285.40
  6. Step 6: Final answer
    x = 180,761.70

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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.