Home / 215,911.40-323,429.70-122,307.80

Finding the Fourth Proportional to 215,911.40, 323,429.70 and 122,307.80

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Solution

The fourth proportional to 215,911.40, 323,429.70 and 122,307.80 is: 183,213.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,911.40 : 323,429.70 = 122,307.80 : x
  2. Step 2: Convert to fraction form
    215,911.40/323,429.70 = 122,307.80/x
  3. Step 3: Cross multiply
    215,911.40x = 323,429.70 × 122,307.80
  4. Step 4: Simplify right side
    215,911.40x = 39,557,975,061.66
  5. Step 5: Solve for x
    x = 39,557,975,061.66/215,911.40
  6. Step 6: Final answer
    x = 183,213.93

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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.