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Finding the Fourth Proportional to 210,863.71, 290,883.30 and 142,857.57

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Solution

The fourth proportional to 210,863.71, 290,883.30 and 142,857.57 is: 197,069.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,863.71 : 290,883.30 = 142,857.57 : x
  2. Step 2: Convert to fraction form
    210,863.71/290,883.30 = 142,857.57/x
  3. Step 3: Cross multiply
    210,863.71x = 290,883.30 × 142,857.57
  4. Step 4: Simplify right side
    210,863.71x = 41,554,882,750.25
  5. Step 5: Solve for x
    x = 41,554,882,750.25/210,863.71
  6. Step 6: Final answer
    x = 197,069.87

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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.