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Finding the Fourth Proportional to 230,954.16, 318,710.56 and 128,976.80

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Solution

The fourth proportional to 230,954.16, 318,710.56 and 128,976.80 is: 177,984.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,954.16 : 318,710.56 = 128,976.80 : x
  2. Step 2: Convert to fraction form
    230,954.16/318,710.56 = 128,976.80/x
  3. Step 3: Cross multiply
    230,954.16x = 318,710.56 × 128,976.80
  4. Step 4: Simplify right side
    230,954.16x = 41,106,268,155.01
  5. Step 5: Solve for x
    x = 41,106,268,155.01/230,954.16
  6. Step 6: Final answer
    x = 177,984.53

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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.