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Finding the Fourth Proportional to 120,088.53, 165,730.74 and 66,372.39

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Solution

The fourth proportional to 120,088.53, 165,730.74 and 66,372.39 is: 91,598.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,088.53 : 165,730.74 = 66,372.39 : x
  2. Step 2: Convert to fraction form
    120,088.53/165,730.74 = 66,372.39/x
  3. Step 3: Cross multiply
    120,088.53x = 165,730.74 × 66,372.39
  4. Step 4: Simplify right side
    120,088.53x = 10,999,945,310.27
  5. Step 5: Solve for x
    x = 10,999,945,310.27/120,088.53
  6. Step 6: Final answer
    x = 91,598.63

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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.