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Finding the Fourth Proportional to 218,860.80, 328,550.40 and 124,166.40

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Solution

The fourth proportional to 218,860.80, 328,550.40 and 124,166.40 is: 186,396.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,860.80 : 328,550.40 = 124,166.40 : x
  2. Step 2: Convert to fraction form
    218,860.80/328,550.40 = 124,166.40/x
  3. Step 3: Cross multiply
    218,860.80x = 328,550.40 × 124,166.40
  4. Step 4: Simplify right side
    218,860.80x = 40,794,920,386.56
  5. Step 5: Solve for x
    x = 40,794,920,386.56/218,860.80
  6. Step 6: Final answer
    x = 186,396.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.