Home / 128,044.48-191,911.20-90,615.56

Finding the Fourth Proportional to 128,044.48, 191,911.20 and 90,615.56

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Solution

The fourth proportional to 128,044.48, 191,911.20 and 90,615.56 is: 135,813.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,044.48 : 191,911.20 = 90,615.56 : x
  2. Step 2: Convert to fraction form
    128,044.48/191,911.20 = 90,615.56/x
  3. Step 3: Cross multiply
    128,044.48x = 191,911.20 × 90,615.56
  4. Step 4: Simplify right side
    128,044.48x = 17,390,140,858.27
  5. Step 5: Solve for x
    x = 17,390,140,858.27/128,044.48
  6. Step 6: Final answer
    x = 135,813.28

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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.