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Finding the Fourth Proportional to 120,009.89, 165,646.62 and 74,660.82

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Solution

The fourth proportional to 120,009.89, 165,646.62 and 74,660.82 is: 103,052.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,009.89 : 165,646.62 = 74,660.82 : x
  2. Step 2: Convert to fraction form
    120,009.89/165,646.62 = 74,660.82/x
  3. Step 3: Cross multiply
    120,009.89x = 165,646.62 × 74,660.82
  4. Step 4: Simplify right side
    120,009.89x = 12,367,312,479.43
  5. Step 5: Solve for x
    x = 12,367,312,479.43/120,009.89
  6. Step 6: Final answer
    x = 103,052.45

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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.