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Finding the Fourth Proportional to 200,491.68, 276,518.88 and 128,879.04

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Solution

The fourth proportional to 200,491.68, 276,518.88 and 128,879.04 is: 177,750.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,491.68 : 276,518.88 = 128,879.04 : x
  2. Step 2: Convert to fraction form
    200,491.68/276,518.88 = 128,879.04/x
  3. Step 3: Cross multiply
    200,491.68x = 276,518.88 × 128,879.04
  4. Step 4: Simplify right side
    200,491.68x = 35,637,487,796.28
  5. Step 5: Solve for x
    x = 35,637,487,796.28/200,491.68
  6. Step 6: Final answer
    x = 177,750.46

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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.