Home / 69,915.36-104,888.40-51,391.20

Finding the Fourth Proportional to 69,915.36, 104,888.40 and 51,391.20

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Solution

The fourth proportional to 69,915.36, 104,888.40 and 51,391.20 is: 77,098.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,915.36 : 104,888.40 = 51,391.20 : x
  2. Step 2: Convert to fraction form
    69,915.36/104,888.40 = 51,391.20/x
  3. Step 3: Cross multiply
    69,915.36x = 104,888.40 × 51,391.20
  4. Step 4: Simplify right side
    69,915.36x = 5,390,340,742.08
  5. Step 5: Solve for x
    x = 5,390,340,742.08/69,915.36
  6. Step 6: Final answer
    x = 77,098.09

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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.