Home / 128,696.90-177,601.21-72,108.14

Finding the Fourth Proportional to 128,696.90, 177,601.21 and 72,108.14

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Solution

The fourth proportional to 128,696.90, 177,601.21 and 72,108.14 is: 99,508.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,696.90 : 177,601.21 = 72,108.14 : x
  2. Step 2: Convert to fraction form
    128,696.90/177,601.21 = 72,108.14/x
  3. Step 3: Cross multiply
    128,696.90x = 177,601.21 × 72,108.14
  4. Step 4: Simplify right side
    128,696.90x = 12,806,491,846.57
  5. Step 5: Solve for x
    x = 12,806,491,846.57/128,696.90
  6. Step 6: Final answer
    x = 99,508.94

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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.