Home / 128,342.20-177,103.24-74,623.41

Finding the Fourth Proportional to 128,342.20, 177,103.24 and 74,623.41

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Solution

The fourth proportional to 128,342.20, 177,103.24 and 74,623.41 is: 102,975.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,342.20 : 177,103.24 = 74,623.41 : x
  2. Step 2: Convert to fraction form
    128,342.20/177,103.24 = 74,623.41/x
  3. Step 3: Cross multiply
    128,342.20x = 177,103.24 × 74,623.41
  4. Step 4: Simplify right side
    128,342.20x = 13,216,047,690.85
  5. Step 5: Solve for x
    x = 13,216,047,690.85/128,342.20
  6. Step 6: Final answer
    x = 102,975.08

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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.