Home / 128,042.48-191,908.20-90,613.56

Finding the Fourth Proportional to 128,042.48, 191,908.20 and 90,613.56

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Solution

The fourth proportional to 128,042.48, 191,908.20 and 90,613.56 is: 135,810.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,042.48 : 191,908.20 = 90,613.56 : x
  2. Step 2: Convert to fraction form
    128,042.48/191,908.20 = 90,613.56/x
  3. Step 3: Cross multiply
    128,042.48x = 191,908.20 × 90,613.56
  4. Step 4: Simplify right side
    128,042.48x = 17,389,485,195.19
  5. Step 5: Solve for x
    x = 17,389,485,195.19/128,042.48
  6. Step 6: Final answer
    x = 135,810.28

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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.