Home / 128,440.17-177,247.94-71,851.59

Finding the Fourth Proportional to 128,440.17, 177,247.94 and 71,851.59

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Solution

The fourth proportional to 128,440.17, 177,247.94 and 71,851.59 is: 99,155.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,440.17 : 177,247.94 = 71,851.59 : x
  2. Step 2: Convert to fraction form
    128,440.17/177,247.94 = 71,851.59/x
  3. Step 3: Cross multiply
    128,440.17x = 177,247.94 × 71,851.59
  4. Step 4: Simplify right side
    128,440.17x = 12,735,545,953.97
  5. Step 5: Solve for x
    x = 12,735,545,953.97/128,440.17
  6. Step 6: Final answer
    x = 99,155.47

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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.