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Finding the Fourth Proportional to 200,658.60, 276,998.04 and 128,156.58

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Solution

The fourth proportional to 200,658.60, 276,998.04 and 128,156.58 is: 176,913.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,658.60 : 276,998.04 = 128,156.58 : x
  2. Step 2: Convert to fraction form
    200,658.60/276,998.04 = 128,156.58/x
  3. Step 3: Cross multiply
    200,658.60x = 276,998.04 × 128,156.58
  4. Step 4: Simplify right side
    200,658.60x = 35,499,121,473.10
  5. Step 5: Solve for x
    x = 35,499,121,473.10/200,658.60
  6. Step 6: Final answer
    x = 176,913.03

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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.