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Finding the Fourth Proportional to 122,357.88, 183,588.66 and 66,889.08

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Solution

The fourth proportional to 122,357.88, 183,588.66 and 66,889.08 is: 100,361.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,357.88 : 183,588.66 = 66,889.08 : x
  2. Step 2: Convert to fraction form
    122,357.88/183,588.66 = 66,889.08/x
  3. Step 3: Cross multiply
    122,357.88x = 183,588.66 × 66,889.08
  4. Step 4: Simplify right side
    122,357.88x = 12,280,076,565.83
  5. Step 5: Solve for x
    x = 12,280,076,565.83/122,357.88
  6. Step 6: Final answer
    x = 100,361.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.