Home / 210,520.40-315,801.85-68,359.73

Finding the Fourth Proportional to 210,520.40, 315,801.85 and 68,359.73

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Solution

The fourth proportional to 210,520.40, 315,801.85 and 68,359.73 is: 102,546.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,520.40 : 315,801.85 = 68,359.73 : x
  2. Step 2: Convert to fraction form
    210,520.40/315,801.85 = 68,359.73/x
  3. Step 3: Cross multiply
    210,520.40x = 315,801.85 × 68,359.73
  4. Step 4: Simplify right side
    210,520.40x = 21,588,129,199.50
  5. Step 5: Solve for x
    x = 21,588,129,199.50/210,520.40
  6. Step 6: Final answer
    x = 102,546.50

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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.