Home / 128,139.40-192,242.70-49,256.20

Finding the Fourth Proportional to 128,139.40, 192,242.70 and 49,256.20

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Solution

The fourth proportional to 128,139.40, 192,242.70 and 49,256.20 is: 73,897.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,139.40 : 192,242.70 = 49,256.20 : x
  2. Step 2: Convert to fraction form
    128,139.40/192,242.70 = 49,256.20/x
  3. Step 3: Cross multiply
    128,139.40x = 192,242.70 × 49,256.20
  4. Step 4: Simplify right side
    128,139.40x = 9,469,144,879.74
  5. Step 5: Solve for x
    x = 9,469,144,879.74/128,139.40
  6. Step 6: Final answer
    x = 73,897.22

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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.