Home / 128,429.37-177,268.15-74,724.76

Finding the Fourth Proportional to 128,429.37, 177,268.15 and 74,724.76

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Solution

The fourth proportional to 128,429.37, 177,268.15 and 74,724.76 is: 103,140.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,429.37 : 177,268.15 = 74,724.76 : x
  2. Step 2: Convert to fraction form
    128,429.37/177,268.15 = 74,724.76/x
  3. Step 3: Cross multiply
    128,429.37x = 177,268.15 × 74,724.76
  4. Step 4: Simplify right side
    128,429.37x = 13,246,320,279.39
  5. Step 5: Solve for x
    x = 13,246,320,279.39/128,429.37
  6. Step 6: Final answer
    x = 103,140.90

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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.