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Finding the Fourth Proportional to 120,790.51, 166,715.39 and 69,805.39

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Solution

The fourth proportional to 120,790.51, 166,715.39 and 69,805.39 is: 96,345.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,790.51 : 166,715.39 = 69,805.39 : x
  2. Step 2: Convert to fraction form
    120,790.51/166,715.39 = 69,805.39/x
  3. Step 3: Cross multiply
    120,790.51x = 166,715.39 × 69,805.39
  4. Step 4: Simplify right side
    120,790.51x = 11,637,632,817.95
  5. Step 5: Solve for x
    x = 11,637,632,817.95/120,790.51
  6. Step 6: Final answer
    x = 96,345.59

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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.