Home / 100,786.12-151,205.10-38,461.48

Finding the Fourth Proportional to 100,786.12, 151,205.10 and 38,461.48

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Solution

The fourth proportional to 100,786.12, 151,205.10 and 38,461.48 is: 57,702.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,786.12 : 151,205.10 = 38,461.48 : x
  2. Step 2: Convert to fraction form
    100,786.12/151,205.10 = 38,461.48/x
  3. Step 3: Cross multiply
    100,786.12x = 151,205.10 × 38,461.48
  4. Step 4: Simplify right side
    100,786.12x = 5,815,571,929.55
  5. Step 5: Solve for x
    x = 5,815,571,929.55/100,786.12
  6. Step 6: Final answer
    x = 57,702.11

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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.