Home / 210,521.18-315,781.30-84,190.94

Finding the Fourth Proportional to 210,521.18, 315,781.30 and 84,190.94

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Solution

The fourth proportional to 210,521.18, 315,781.30 and 84,190.94 is: 126,286.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,521.18 : 315,781.30 = 84,190.94 : x
  2. Step 2: Convert to fraction form
    210,521.18/315,781.30 = 84,190.94/x
  3. Step 3: Cross multiply
    210,521.18x = 315,781.30 × 84,190.94
  4. Step 4: Simplify right side
    210,521.18x = 26,585,925,968.20
  5. Step 5: Solve for x
    x = 26,585,925,968.20/210,521.18
  6. Step 6: Final answer
    x = 126,286.23

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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.