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Finding the Fourth Proportional to 210,417.80, 315,626.70 and 131,774.60

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Solution

The fourth proportional to 210,417.80, 315,626.70 and 131,774.60 is: 197,661.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,417.80 : 315,626.70 = 131,774.60 : x
  2. Step 2: Convert to fraction form
    210,417.80/315,626.70 = 131,774.60/x
  3. Step 3: Cross multiply
    210,417.80x = 315,626.70 × 131,774.60
  4. Step 4: Simplify right side
    210,417.80x = 41,591,582,141.82
  5. Step 5: Solve for x
    x = 41,591,582,141.82/210,417.80
  6. Step 6: Final answer
    x = 197,661.90

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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.