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Finding the Fourth Proportional to 99,413.49, 137,145.99 and 67,137.63

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Solution

The fourth proportional to 99,413.49, 137,145.99 and 67,137.63 is: 92,619.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,413.49 : 137,145.99 = 67,137.63 : x
  2. Step 2: Convert to fraction form
    99,413.49/137,145.99 = 67,137.63/x
  3. Step 3: Cross multiply
    99,413.49x = 137,145.99 × 67,137.63
  4. Step 4: Simplify right side
    99,413.49x = 9,207,656,470.07
  5. Step 5: Solve for x
    x = 9,207,656,470.07/99,413.49
  6. Step 6: Final answer
    x = 92,619.79

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1.5x scale

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.