Home / 210,921.57-316,382.36-70,778.61

Finding the Fourth Proportional to 210,921.57, 316,382.36 and 70,778.61

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Solution

The fourth proportional to 210,921.57, 316,382.36 and 70,778.61 is: 106,167.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,921.57 : 316,382.36 = 70,778.61 : x
  2. Step 2: Convert to fraction form
    210,921.57/316,382.36 = 70,778.61/x
  3. Step 3: Cross multiply
    210,921.57x = 316,382.36 × 70,778.61
  4. Step 4: Simplify right side
    210,921.57x = 22,393,103,315.43
  5. Step 5: Solve for x
    x = 22,393,103,315.43/210,921.57
  6. Step 6: Final answer
    x = 106,167.92

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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.