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Finding the Fourth Proportional to 138,404.63, 190,997.52 and 77,994.68

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Solution

The fourth proportional to 138,404.63, 190,997.52 and 77,994.68 is: 107,632.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,404.63 : 190,997.52 = 77,994.68 : x
  2. Step 2: Convert to fraction form
    138,404.63/190,997.52 = 77,994.68/x
  3. Step 3: Cross multiply
    138,404.63x = 190,997.52 × 77,994.68
  4. Step 4: Simplify right side
    138,404.63x = 14,896,789,205.73
  5. Step 5: Solve for x
    x = 14,896,789,205.73/138,404.63
  6. Step 6: Final answer
    x = 107,632.16

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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.