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Finding the Fourth Proportional to 105,159.80, 145,119.78 and 57,413.15

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Solution

The fourth proportional to 105,159.80, 145,119.78 and 57,413.15 is: 79,229.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,159.80 : 145,119.78 = 57,413.15 : x
  2. Step 2: Convert to fraction form
    105,159.80/145,119.78 = 57,413.15/x
  3. Step 3: Cross multiply
    105,159.80x = 145,119.78 × 57,413.15
  4. Step 4: Simplify right side
    105,159.80x = 8,331,783,731.01
  5. Step 5: Solve for x
    x = 8,331,783,731.01/105,159.80
  6. Step 6: Final answer
    x = 79,229.74

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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.