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Finding the Fourth Proportional to 210,574.44, 315,648.84 and 90,709.56

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Solution

The fourth proportional to 210,574.44, 315,648.84 and 90,709.56 is: 135,972.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,574.44 : 315,648.84 = 90,709.56 : x
  2. Step 2: Convert to fraction form
    210,574.44/315,648.84 = 90,709.56/x
  3. Step 3: Cross multiply
    210,574.44x = 315,648.84 × 90,709.56
  4. Step 4: Simplify right side
    210,574.44x = 28,632,367,390.91
  5. Step 5: Solve for x
    x = 28,632,367,390.91/210,574.44
  6. Step 6: Final answer
    x = 135,972.66

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1.5x scale

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.