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Finding the Fourth Proportional to 120,137.68, 165,802.08 and 66,426.76

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Solution

The fourth proportional to 120,137.68, 165,802.08 and 66,426.76 is: 91,675.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,137.68 : 165,802.08 = 66,426.76 : x
  2. Step 2: Convert to fraction form
    120,137.68/165,802.08 = 66,426.76/x
  3. Step 3: Cross multiply
    120,137.68x = 165,802.08 × 66,426.76
  4. Step 4: Simplify right side
    120,137.68x = 11,013,694,975.66
  5. Step 5: Solve for x
    x = 11,013,694,975.66/120,137.68
  6. Step 6: Final answer
    x = 91,675.61

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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.