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Finding the Fourth Proportional to 69,645.69, 96,109.29 and 39,430.80

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Solution

The fourth proportional to 69,645.69, 96,109.29 and 39,430.80 is: 54,413.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,645.69 : 96,109.29 = 39,430.80 : x
  2. Step 2: Convert to fraction form
    69,645.69/96,109.29 = 39,430.80/x
  3. Step 3: Cross multiply
    69,645.69x = 96,109.29 × 39,430.80
  4. Step 4: Simplify right side
    69,645.69x = 3,789,666,192.13
  5. Step 5: Solve for x
    x = 3,789,666,192.13/69,645.69
  6. Step 6: Final answer
    x = 54,413.51

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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.