Home / 128,704.02-177,604.29-74,997.78

Finding the Fourth Proportional to 128,704.02, 177,604.29 and 74,997.78

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Solution

The fourth proportional to 128,704.02, 177,604.29 and 74,997.78 is: 103,492.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,704.02 : 177,604.29 = 74,997.78 : x
  2. Step 2: Convert to fraction form
    128,704.02/177,604.29 = 74,997.78/x
  3. Step 3: Cross multiply
    128,704.02x = 177,604.29 × 74,997.78
  4. Step 4: Simplify right side
    128,704.02x = 13,319,927,468.48
  5. Step 5: Solve for x
    x = 13,319,927,468.48/128,704.02
  6. Step 6: Final answer
    x = 103,492.71

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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.