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Finding the Fourth Proportional to 76,145.49, 104,970.69 and 53,413.97

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Solution

The fourth proportional to 76,145.49, 104,970.69 and 53,413.97 is: 73,634.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,145.49 : 104,970.69 = 53,413.97 : x
  2. Step 2: Convert to fraction form
    76,145.49/104,970.69 = 53,413.97/x
  3. Step 3: Cross multiply
    76,145.49x = 104,970.69 × 53,413.97
  4. Step 4: Simplify right side
    76,145.49x = 5,606,900,761.69
  5. Step 5: Solve for x
    x = 5,606,900,761.69/76,145.49
  6. Step 6: Final answer
    x = 73,634.05

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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.