Home / 128,628.93-177,513.39-74,905.29

Finding the Fourth Proportional to 128,628.93, 177,513.39 and 74,905.29

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Solution

The fourth proportional to 128,628.93, 177,513.39 and 74,905.29 is: 103,372.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,628.93 : 177,513.39 = 74,905.29 : x
  2. Step 2: Convert to fraction form
    128,628.93/177,513.39 = 74,905.29/x
  3. Step 3: Cross multiply
    128,628.93x = 177,513.39 × 74,905.29
  4. Step 4: Simplify right side
    128,628.93x = 13,296,691,956.83
  5. Step 5: Solve for x
    x = 13,296,691,956.83/128,628.93
  6. Step 6: Final answer
    x = 103,372.48

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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.