Home / 128,588.70-177,791.02-112,627.35

Finding the Fourth Proportional to 128,588.70, 177,791.02 and 112,627.35

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Solution

The fourth proportional to 128,588.70, 177,791.02 and 112,627.35 is: 155,722.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,588.70 : 177,791.02 = 112,627.35 : x
  2. Step 2: Convert to fraction form
    128,588.70/177,791.02 = 112,627.35/x
  3. Step 3: Cross multiply
    128,588.70x = 177,791.02 × 112,627.35
  4. Step 4: Simplify right side
    128,588.70x = 20,024,131,436.40
  5. Step 5: Solve for x
    x = 20,024,131,436.40/128,588.70
  6. Step 6: Final answer
    x = 155,722.33

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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.