Home / 210,461.09-315,682.11-77,331.61

Finding the Fourth Proportional to 210,461.09, 315,682.11 and 77,331.61

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Solution

The fourth proportional to 210,461.09, 315,682.11 and 77,331.61 is: 115,993.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,461.09 : 315,682.11 = 77,331.61 : x
  2. Step 2: Convert to fraction form
    210,461.09/315,682.11 = 77,331.61/x
  3. Step 3: Cross multiply
    210,461.09x = 315,682.11 × 77,331.61
  4. Step 4: Simplify right side
    210,461.09x = 24,412,206,209.10
  5. Step 5: Solve for x
    x = 24,412,206,209.10/210,461.09
  6. Step 6: Final answer
    x = 115,993.92

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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.