Home / 128,423.49-177,268.16-74,753.61

Finding the Fourth Proportional to 128,423.49, 177,268.16 and 74,753.61

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Solution

The fourth proportional to 128,423.49, 177,268.16 and 74,753.61 is: 103,185.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,423.49 : 177,268.16 = 74,753.61 : x
  2. Step 2: Convert to fraction form
    128,423.49/177,268.16 = 74,753.61/x
  3. Step 3: Cross multiply
    128,423.49x = 177,268.16 × 74,753.61
  4. Step 4: Simplify right side
    128,423.49x = 13,251,434,198.60
  5. Step 5: Solve for x
    x = 13,251,434,198.60/128,423.49
  6. Step 6: Final answer
    x = 103,185.44

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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.