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Finding the Fourth Proportional to 120,009.74, 165,599.24 and 66,291.54

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Solution

The fourth proportional to 120,009.74, 165,599.24 and 66,291.54 is: 91,474.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,009.74 : 165,599.24 = 66,291.54 : x
  2. Step 2: Convert to fraction form
    120,009.74/165,599.24 = 66,291.54/x
  3. Step 3: Cross multiply
    120,009.74x = 165,599.24 × 66,291.54
  4. Step 4: Simplify right side
    120,009.74x = 10,977,828,642.43
  5. Step 5: Solve for x
    x = 10,977,828,642.43/120,009.74
  6. Step 6: Final answer
    x = 91,474.48

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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.