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Finding the Fourth Proportional to 120,008.39, 165,644.55 and 74,659.32

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Solution

The fourth proportional to 120,008.39, 165,644.55 and 74,659.32 is: 103,050.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,008.39 : 165,644.55 = 74,659.32 : x
  2. Step 2: Convert to fraction form
    120,008.39/165,644.55 = 74,659.32/x
  3. Step 3: Cross multiply
    120,008.39x = 165,644.55 × 74,659.32
  4. Step 4: Simplify right side
    120,008.39x = 12,366,909,464.71
  5. Step 5: Solve for x
    x = 12,366,909,464.71/120,008.39
  6. Step 6: Final answer
    x = 103,050.38

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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.