Home / 128,242.77-176,883.22-90,010.85

Finding the Fourth Proportional to 128,242.77, 176,883.22 and 90,010.85

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Solution

The fourth proportional to 128,242.77, 176,883.22 and 90,010.85 is: 124,150.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,242.77 : 176,883.22 = 90,010.85 : x
  2. Step 2: Convert to fraction form
    128,242.77/176,883.22 = 90,010.85/x
  3. Step 3: Cross multiply
    128,242.77x = 176,883.22 × 90,010.85
  4. Step 4: Simplify right side
    128,242.77x = 15,921,407,957.88
  5. Step 5: Solve for x
    x = 15,921,407,957.88/128,242.77
  6. Step 6: Final answer
    x = 124,150.53

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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.