Home / 128,219.02-192,156.61-99,790.30

Finding the Fourth Proportional to 128,219.02, 192,156.61 and 99,790.30

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Solution

The fourth proportional to 128,219.02, 192,156.61 and 99,790.30 is: 149,551.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,219.02 : 192,156.61 = 99,790.30 : x
  2. Step 2: Convert to fraction form
    128,219.02/192,156.61 = 99,790.30/x
  3. Step 3: Cross multiply
    128,219.02x = 192,156.61 × 99,790.30
  4. Step 4: Simplify right side
    128,219.02x = 19,175,366,231.57
  5. Step 5: Solve for x
    x = 19,175,366,231.57/128,219.02
  6. Step 6: Final answer
    x = 149,551.66

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1.5x scale

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.