Home / 99,905.19-149,760.37-39,915.78

Finding the Fourth Proportional to 99,905.19, 149,760.37 and 39,915.78

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Solution

The fourth proportional to 99,905.19, 149,760.37 and 39,915.78 is: 59,834.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,905.19 : 149,760.37 = 39,915.78 : x
  2. Step 2: Convert to fraction form
    99,905.19/149,760.37 = 39,915.78/x
  3. Step 3: Cross multiply
    99,905.19x = 149,760.37 × 39,915.78
  4. Step 4: Simplify right side
    99,905.19x = 5,977,801,981.64
  5. Step 5: Solve for x
    x = 5,977,801,981.64/99,905.19
  6. Step 6: Final answer
    x = 59,834.75

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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.