Home / 230,188.02-317,639.25-128,205.78

Finding the Fourth Proportional to 230,188.02, 317,639.25 and 128,205.78

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Solution

The fourth proportional to 230,188.02, 317,639.25 and 128,205.78 is: 176,912.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,188.02 : 317,639.25 = 128,205.78 : x
  2. Step 2: Convert to fraction form
    230,188.02/317,639.25 = 128,205.78/x
  3. Step 3: Cross multiply
    230,188.02x = 317,639.25 × 128,205.78
  4. Step 4: Simplify right side
    230,188.02x = 40,723,187,804.87
  5. Step 5: Solve for x
    x = 40,723,187,804.87/230,188.02
  6. Step 6: Final answer
    x = 176,912.72

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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.