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Finding the Fourth Proportional to 205,712.39, 308,568.59 and 87,300.69

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Solution

The fourth proportional to 205,712.39, 308,568.59 and 87,300.69 is: 130,951.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,712.39 : 308,568.59 = 87,300.69 : x
  2. Step 2: Convert to fraction form
    205,712.39/308,568.59 = 87,300.69/x
  3. Step 3: Cross multiply
    205,712.39x = 308,568.59 × 87,300.69
  4. Step 4: Simplify right side
    205,712.39x = 26,938,250,382.82
  5. Step 5: Solve for x
    x = 26,938,250,382.82/205,712.39
  6. Step 6: Final answer
    x = 130,951.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.