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Finding the Fourth Proportional to 128,284.39, 177,060.57 and 74,600.38

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Solution

The fourth proportional to 128,284.39, 177,060.57 and 74,600.38 is: 102,964.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,284.39 : 177,060.57 = 74,600.38 : x
  2. Step 2: Convert to fraction form
    128,284.39/177,060.57 = 74,600.38/x
  3. Step 3: Cross multiply
    128,284.39x = 177,060.57 × 74,600.38
  4. Step 4: Simplify right side
    128,284.39x = 13,208,785,746.59
  5. Step 5: Solve for x
    x = 13,208,785,746.59/128,284.39
  6. Step 6: Final answer
    x = 102,964.87

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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.