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Finding the Fourth Proportional to 100,410.06, 138,565.95 and 55,698.06

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Solution

The fourth proportional to 100,410.06, 138,565.95 and 55,698.06 is: 76,863.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,410.06 : 138,565.95 = 55,698.06 : x
  2. Step 2: Convert to fraction form
    100,410.06/138,565.95 = 55,698.06/x
  3. Step 3: Cross multiply
    100,410.06x = 138,565.95 × 55,698.06
  4. Step 4: Simplify right side
    100,410.06x = 7,717,854,597.06
  5. Step 5: Solve for x
    x = 7,717,854,597.06/100,410.06
  6. Step 6: Final answer
    x = 76,863.36

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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.