Home / 100,410.10-138,710.12-80,240.56

Finding the Fourth Proportional to 100,410.10, 138,710.12 and 80,240.56

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Solution

The fourth proportional to 100,410.10, 138,710.12 and 80,240.56 is: 110,847.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,410.10 : 138,710.12 = 80,240.56 : x
  2. Step 2: Convert to fraction form
    100,410.10/138,710.12 = 80,240.56/x
  3. Step 3: Cross multiply
    100,410.10x = 138,710.12 × 80,240.56
  4. Step 4: Simplify right side
    100,410.10x = 11,130,177,706.47
  5. Step 5: Solve for x
    x = 11,130,177,706.47/100,410.10
  6. Step 6: Final answer
    x = 110,847.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.