Home / 218,965.36-328,302.20-78,705.76

Finding the Fourth Proportional to 218,965.36, 328,302.20 and 78,705.76

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Solution

The fourth proportional to 218,965.36, 328,302.20 and 78,705.76 is: 118,006.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,965.36 : 328,302.20 = 78,705.76 : x
  2. Step 2: Convert to fraction form
    218,965.36/328,302.20 = 78,705.76/x
  3. Step 3: Cross multiply
    218,965.36x = 328,302.20 × 78,705.76
  4. Step 4: Simplify right side
    218,965.36x = 25,839,273,767.14
  5. Step 5: Solve for x
    x = 25,839,273,767.14/218,965.36
  6. Step 6: Final answer
    x = 118,006.22

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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.