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Finding the Fourth Proportional to 230,491.17, 318,046.50 and 128,504.07

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Solution

The fourth proportional to 230,491.17, 318,046.50 and 128,504.07 is: 177,318.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,491.17 : 318,046.50 = 128,504.07 : x
  2. Step 2: Convert to fraction form
    230,491.17/318,046.50 = 128,504.07/x
  3. Step 3: Cross multiply
    230,491.17x = 318,046.50 × 128,504.07
  4. Step 4: Simplify right side
    230,491.17x = 40,870,269,699.26
  5. Step 5: Solve for x
    x = 40,870,269,699.26/230,491.17
  6. Step 6: Final answer
    x = 177,318.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.