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Finding the Fourth Proportional to 115,413.66, 158,915.59 and 98,379.70

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Solution

The fourth proportional to 115,413.66, 158,915.59 and 98,379.70 is: 135,461.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,413.66 : 158,915.59 = 98,379.70 : x
  2. Step 2: Convert to fraction form
    115,413.66/158,915.59 = 98,379.70/x
  3. Step 3: Cross multiply
    115,413.66x = 158,915.59 × 98,379.70
  4. Step 4: Simplify right side
    115,413.66x = 15,634,067,426.28
  5. Step 5: Solve for x
    x = 15,634,067,426.28/115,413.66
  6. Step 6: Final answer
    x = 135,461.15

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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.