Home / 210,409.02-315,687.24-131,430.78

Finding the Fourth Proportional to 210,409.02, 315,687.24 and 131,430.78

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Solution

The fourth proportional to 210,409.02, 315,687.24 and 131,430.78 is: 197,192.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,409.02 : 315,687.24 = 131,430.78 : x
  2. Step 2: Convert to fraction form
    210,409.02/315,687.24 = 131,430.78/x
  3. Step 3: Cross multiply
    210,409.02x = 315,687.24 × 131,430.78
  4. Step 4: Simplify right side
    210,409.02x = 41,491,020,189.25
  5. Step 5: Solve for x
    x = 41,491,020,189.25/210,409.02
  6. Step 6: Final answer
    x = 197,192.21

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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.