Home / 138,416.78-191,002.62-77,997.26

Finding the Fourth Proportional to 138,416.78, 191,002.62 and 77,997.26

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Solution

The fourth proportional to 138,416.78, 191,002.62 and 77,997.26 is: 107,629.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,416.78 : 191,002.62 = 77,997.26 : x
  2. Step 2: Convert to fraction form
    138,416.78/191,002.62 = 77,997.26/x
  3. Step 3: Cross multiply
    138,416.78x = 191,002.62 × 77,997.26
  4. Step 4: Simplify right side
    138,416.78x = 14,897,681,012.82
  5. Step 5: Solve for x
    x = 14,897,681,012.82/138,416.78
  6. Step 6: Final answer
    x = 107,629.15

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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.