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Finding the Fourth Proportional to 120,703.25, 166,569.26 and 66,988.71

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Solution

The fourth proportional to 120,703.25, 166,569.26 and 66,988.71 is: 92,443.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,703.25 : 166,569.26 = 66,988.71 : x
  2. Step 2: Convert to fraction form
    120,703.25/166,569.26 = 66,988.71/x
  3. Step 3: Cross multiply
    120,703.25x = 166,569.26 × 66,988.71
  4. Step 4: Simplify right side
    120,703.25x = 11,158,259,518.11
  5. Step 5: Solve for x
    x = 11,158,259,518.11/120,703.25
  6. Step 6: Final answer
    x = 92,443.74

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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.