Home / 138,413.19-207,619.81-79,207

Finding the Fourth Proportional to 138,413.19, 207,619.81 and 79,207

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Solution

The fourth proportional to 138,413.19, 207,619.81 and 79,207 is: 118,810.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,413.19 : 207,619.81 = 79,207 : x
  2. Step 2: Convert to fraction form
    138,413.19/207,619.81 = 79,207/x
  3. Step 3: Cross multiply
    138,413.19x = 207,619.81 × 79,207
  4. Step 4: Simplify right side
    138,413.19x = 16,444,942,290.67
  5. Step 5: Solve for x
    x = 16,444,942,290.67/138,413.19
  6. Step 6: Final answer
    x = 118,810.51

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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.