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Finding the Fourth Proportional to 120,090.63, 165,614.88 and 72,260.94

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Solution

The fourth proportional to 120,090.63, 165,614.88 and 72,260.94 is: 99,653.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,090.63 : 165,614.88 = 72,260.94 : x
  2. Step 2: Convert to fraction form
    120,090.63/165,614.88 = 72,260.94/x
  3. Step 3: Cross multiply
    120,090.63x = 165,614.88 × 72,260.94
  4. Step 4: Simplify right side
    120,090.63x = 11,967,486,906.79
  5. Step 5: Solve for x
    x = 11,967,486,906.79/120,090.63
  6. Step 6: Final answer
    x = 99,653.79

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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.