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Finding the Fourth Proportional to 154,327.74, 212,978.34 and 90,664.98

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Solution

The fourth proportional to 154,327.74, 212,978.34 and 90,664.98 is: 125,121.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,327.74 : 212,978.34 = 90,664.98 : x
  2. Step 2: Convert to fraction form
    154,327.74/212,978.34 = 90,664.98/x
  3. Step 3: Cross multiply
    154,327.74x = 212,978.34 × 90,664.98
  4. Step 4: Simplify right side
    154,327.74x = 19,309,676,936.53
  5. Step 5: Solve for x
    x = 19,309,676,936.53/154,327.74
  6. Step 6: Final answer
    x = 125,121.23

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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.