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Finding the Fourth Proportional to 154,870.70, 213,796.66 and 103,864.78

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Solution

The fourth proportional to 154,870.70, 213,796.66 and 103,864.78 is: 143,383.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,870.70 : 213,796.66 = 103,864.78 : x
  2. Step 2: Convert to fraction form
    154,870.70/213,796.66 = 103,864.78/x
  3. Step 3: Cross multiply
    154,870.70x = 213,796.66 × 103,864.78
  4. Step 4: Simplify right side
    154,870.70x = 22,205,942,261.48
  5. Step 5: Solve for x
    x = 22,205,942,261.48/154,870.70
  6. Step 6: Final answer
    x = 143,383.75

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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.