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Finding the Fourth Proportional to 120,108.93, 165,750.27 and 66,393.94

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Solution

The fourth proportional to 120,108.93, 165,750.27 and 66,393.94 is: 91,623.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,108.93 : 165,750.27 = 66,393.94 : x
  2. Step 2: Convert to fraction form
    120,108.93/165,750.27 = 66,393.94/x
  3. Step 3: Cross multiply
    120,108.93x = 165,750.27 × 66,393.94
  4. Step 4: Simplify right side
    120,108.93x = 11,004,812,320.64
  5. Step 5: Solve for x
    x = 11,004,812,320.64/120,108.93
  6. Step 6: Final answer
    x = 91,623.60

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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.