Home / 128,280.12-192,317.79-64,195.82

Finding the Fourth Proportional to 128,280.12, 192,317.79 and 64,195.82

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Solution

The fourth proportional to 128,280.12, 192,317.79 and 64,195.82 is: 96,242.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,280.12 : 192,317.79 = 64,195.82 : x
  2. Step 2: Convert to fraction form
    128,280.12/192,317.79 = 64,195.82/x
  3. Step 3: Cross multiply
    128,280.12x = 192,317.79 × 64,195.82
  4. Step 4: Simplify right side
    128,280.12x = 12,345,997,689.08
  5. Step 5: Solve for x
    x = 12,345,997,689.08/128,280.12
  6. Step 6: Final answer
    x = 96,242.49

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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.