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Finding the Fourth Proportional to 215,724.51, 297,700.12 and 129,684.44

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Solution

The fourth proportional to 215,724.51, 297,700.12 and 129,684.44 is: 178,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,724.51 : 297,700.12 = 129,684.44 : x
  2. Step 2: Convert to fraction form
    215,724.51/297,700.12 = 129,684.44/x
  3. Step 3: Cross multiply
    215,724.51x = 297,700.12 × 129,684.44
  4. Step 4: Simplify right side
    215,724.51x = 38,607,074,418.59
  5. Step 5: Solve for x
    x = 38,607,074,418.59/215,724.51
  6. Step 6: Final answer
    x = 178,964.71

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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.