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Finding the Fourth Proportional to 120,193.65, 165,868.70 and 66,477.29

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Solution

The fourth proportional to 120,193.65, 165,868.70 and 66,477.29 is: 91,739.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,193.65 : 165,868.70 = 66,477.29 : x
  2. Step 2: Convert to fraction form
    120,193.65/165,868.70 = 66,477.29/x
  3. Step 3: Cross multiply
    120,193.65x = 165,868.70 × 66,477.29
  4. Step 4: Simplify right side
    120,193.65x = 11,026,500,510.09
  5. Step 5: Solve for x
    x = 11,026,500,510.09/120,193.65
  6. Step 6: Final answer
    x = 91,739.46

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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.