Home / 121,450.80-182,081.40-77,069.28

Finding the Fourth Proportional to 121,450.80, 182,081.40 and 77,069.28

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Solution

The fourth proportional to 121,450.80, 182,081.40 and 77,069.28 is: 115,543.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,450.80 : 182,081.40 = 77,069.28 : x
  2. Step 2: Convert to fraction form
    121,450.80/182,081.40 = 77,069.28/x
  3. Step 3: Cross multiply
    121,450.80x = 182,081.40 × 77,069.28
  4. Step 4: Simplify right side
    121,450.80x = 14,032,882,399.39
  5. Step 5: Solve for x
    x = 14,032,882,399.39/121,450.80
  6. Step 6: Final answer
    x = 115,543.76

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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.