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Finding the Fourth Proportional to 45,715.80, 68,544.10 and 19,413.40

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Solution

The fourth proportional to 45,715.80, 68,544.10 and 19,413.40 is: 29,107.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,715.80 : 68,544.10 = 19,413.40 : x
  2. Step 2: Convert to fraction form
    45,715.80/68,544.10 = 19,413.40/x
  3. Step 3: Cross multiply
    45,715.80x = 68,544.10 × 19,413.40
  4. Step 4: Simplify right side
    45,715.80x = 1,330,674,030.94
  5. Step 5: Solve for x
    x = 1,330,674,030.94/45,715.80
  6. Step 6: Final answer
    x = 29,107.53

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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.