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Finding the Fourth Proportional to 209,506.88, 289,126.05 and 118,866.66

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Solution

The fourth proportional to 209,506.88, 289,126.05 and 118,866.66 is: 164,039.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,506.88 : 289,126.05 = 118,866.66 : x
  2. Step 2: Convert to fraction form
    209,506.88/289,126.05 = 118,866.66/x
  3. Step 3: Cross multiply
    209,506.88x = 289,126.05 × 118,866.66
  4. Step 4: Simplify right side
    209,506.88x = 34,367,448,647.48
  5. Step 5: Solve for x
    x = 34,367,448,647.48/209,506.88
  6. Step 6: Final answer
    x = 164,039.72

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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.