Home / 210,115.76-291,186.43-206,128.40

Finding the Fourth Proportional to 210,115.76, 291,186.43 and 206,128.40

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Solution

The fourth proportional to 210,115.76, 291,186.43 and 206,128.40 is: 285,660.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,115.76 : 291,186.43 = 206,128.40 : x
  2. Step 2: Convert to fraction form
    210,115.76/291,186.43 = 206,128.40/x
  3. Step 3: Cross multiply
    210,115.76x = 291,186.43 × 206,128.40
  4. Step 4: Simplify right side
    210,115.76x = 60,021,791,886.97
  5. Step 5: Solve for x
    x = 60,021,791,886.97/210,115.76
  6. Step 6: Final answer
    x = 285,660.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.