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Finding the Fourth Proportional to 210,696.87, 315,979.43 and 70,422.69

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Solution

The fourth proportional to 210,696.87, 315,979.43 and 70,422.69 is: 105,612.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,696.87 : 315,979.43 = 70,422.69 : x
  2. Step 2: Convert to fraction form
    210,696.87/315,979.43 = 70,422.69/x
  3. Step 3: Cross multiply
    210,696.87x = 315,979.43 × 70,422.69
  4. Step 4: Simplify right side
    210,696.87x = 22,252,121,093.15
  5. Step 5: Solve for x
    x = 22,252,121,093.15/210,696.87
  6. Step 6: Final answer
    x = 105,612.02

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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.