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Finding the Fourth Proportional to 158,269.93, 218,413.14 and 86,656.61

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Solution

The fourth proportional to 158,269.93, 218,413.14 and 86,656.61 is: 119,586.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,269.93 : 218,413.14 = 86,656.61 : x
  2. Step 2: Convert to fraction form
    158,269.93/218,413.14 = 86,656.61/x
  3. Step 3: Cross multiply
    158,269.93x = 218,413.14 × 86,656.61
  4. Step 4: Simplify right side
    158,269.93x = 18,926,942,291.86
  5. Step 5: Solve for x
    x = 18,926,942,291.86/158,269.93
  6. Step 6: Final answer
    x = 119,586.47

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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.