Home / 78,128.36-107,809.43-43,666.73

Finding the Fourth Proportional to 78,128.36, 107,809.43 and 43,666.73

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Solution

The fourth proportional to 78,128.36, 107,809.43 and 43,666.73 is: 60,255.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,128.36 : 107,809.43 = 43,666.73 : x
  2. Step 2: Convert to fraction form
    78,128.36/107,809.43 = 43,666.73/x
  3. Step 3: Cross multiply
    78,128.36x = 107,809.43 × 43,666.73
  4. Step 4: Simplify right side
    78,128.36x = 4,707,684,513.88
  5. Step 5: Solve for x
    x = 4,707,684,513.88/78,128.36
  6. Step 6: Final answer
    x = 60,255.77

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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.