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Finding the Fourth Proportional to 103,694.60, 155,413.90 and 70,414.60

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Solution

The fourth proportional to 103,694.60, 155,413.90 and 70,414.60 is: 105,534.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,694.60 : 155,413.90 = 70,414.60 : x
  2. Step 2: Convert to fraction form
    103,694.60/155,413.90 = 70,414.60/x
  3. Step 3: Cross multiply
    103,694.60x = 155,413.90 × 70,414.60
  4. Step 4: Simplify right side
    103,694.60x = 10,943,407,602.94
  5. Step 5: Solve for x
    x = 10,943,407,602.94/103,694.60
  6. Step 6: Final answer
    x = 105,534.98

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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.