Home / 112,128.40-168,108.90-67,745.80

Finding the Fourth Proportional to 112,128.40, 168,108.90 and 67,745.80

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Solution

The fourth proportional to 112,128.40, 168,108.90 and 67,745.80 is: 101,568.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,128.40 : 168,108.90 = 67,745.80 : x
  2. Step 2: Convert to fraction form
    112,128.40/168,108.90 = 67,745.80/x
  3. Step 3: Cross multiply
    112,128.40x = 168,108.90 × 67,745.80
  4. Step 4: Simplify right side
    112,128.40x = 11,388,671,917.62
  5. Step 5: Solve for x
    x = 11,388,671,917.62/112,128.40
  6. Step 6: Final answer
    x = 101,568.13

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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.