Home / 128,043.10-192,064.65-83,136.70

Finding the Fourth Proportional to 128,043.10, 192,064.65 and 83,136.70

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Solution

The fourth proportional to 128,043.10, 192,064.65 and 83,136.70 is: 124,705.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,043.10 : 192,064.65 = 83,136.70 : x
  2. Step 2: Convert to fraction form
    128,043.10/192,064.65 = 83,136.70/x
  3. Step 3: Cross multiply
    128,043.10x = 192,064.65 × 83,136.70
  4. Step 4: Simplify right side
    128,043.10x = 15,967,621,187.66
  5. Step 5: Solve for x
    x = 15,967,621,187.66/128,043.10
  6. Step 6: Final answer
    x = 124,705.05

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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.