Home / 128,845.08-193,313.66-78,346.85

Finding the Fourth Proportional to 128,845.08, 193,313.66 and 78,346.85

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Solution

The fourth proportional to 128,845.08, 193,313.66 and 78,346.85 is: 117,548.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,845.08 : 193,313.66 = 78,346.85 : x
  2. Step 2: Convert to fraction form
    128,845.08/193,313.66 = 78,346.85/x
  3. Step 3: Cross multiply
    128,845.08x = 193,313.66 × 78,346.85
  4. Step 4: Simplify right side
    128,845.08x = 15,145,514,964.67
  5. Step 5: Solve for x
    x = 15,145,514,964.67/128,845.08
  6. Step 6: Final answer
    x = 117,548.26

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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.