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Finding the Fourth Proportional to 230,028.60, 317,439 and 129,426.60

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Solution

The fourth proportional to 230,028.60, 317,439 and 129,426.60 is: 178,608.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,028.60 : 317,439 = 129,426.60 : x
  2. Step 2: Convert to fraction form
    230,028.60/317,439 = 129,426.60/x
  3. Step 3: Cross multiply
    230,028.60x = 317,439 × 129,426.60
  4. Step 4: Simplify right side
    230,028.60x = 41,085,050,477.40
  5. Step 5: Solve for x
    x = 41,085,050,477.40/230,028.60
  6. Step 6: Final answer
    x = 178,608.44

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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.