Home / 78,723.19-118,107.80-25,413.92

Finding the Fourth Proportional to 78,723.19, 118,107.80 and 25,413.92

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Solution

The fourth proportional to 78,723.19, 118,107.80 and 25,413.92 is: 38,128.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,723.19 : 118,107.80 = 25,413.92 : x
  2. Step 2: Convert to fraction form
    78,723.19/118,107.80 = 25,413.92/x
  3. Step 3: Cross multiply
    78,723.19x = 118,107.80 × 25,413.92
  4. Step 4: Simplify right side
    78,723.19x = 3,001,582,053.51
  5. Step 5: Solve for x
    x = 3,001,582,053.51/78,723.19
  6. Step 6: Final answer
    x = 38,128.31

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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.