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Finding the Fourth Proportional to 154,878, 213,698.68 and 91,192.56

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Solution

The fourth proportional to 154,878, 213,698.68 and 91,192.56 is: 125,826.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,878 : 213,698.68 = 91,192.56 : x
  2. Step 2: Convert to fraction form
    154,878/213,698.68 = 91,192.56/x
  3. Step 3: Cross multiply
    154,878x = 213,698.68 × 91,192.56
  4. Step 4: Simplify right side
    154,878x = 19,487,729,697.82
  5. Step 5: Solve for x
    x = 19,487,729,697.82/154,878
  6. Step 6: Final answer
    x = 125,826.33

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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.