Home / 100,043.10-150,181.90-78,997.28

Finding the Fourth Proportional to 100,043.10, 150,181.90 and 78,997.28

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Solution

The fourth proportional to 100,043.10, 150,181.90 and 78,997.28 is: 118,588.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,043.10 : 150,181.90 = 78,997.28 : x
  2. Step 2: Convert to fraction form
    100,043.10/150,181.90 = 78,997.28/x
  3. Step 3: Cross multiply
    100,043.10x = 150,181.90 × 78,997.28
  4. Step 4: Simplify right side
    100,043.10x = 11,863,960,656.83
  5. Step 5: Solve for x
    x = 11,863,960,656.83/100,043.10
  6. Step 6: Final answer
    x = 118,588.49

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1.5x scale

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.