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Finding the Fourth Proportional to 123,482.61, 170,413.88 and 75,729.47

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Solution

The fourth proportional to 123,482.61, 170,413.88 and 75,729.47 is: 104,511.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,482.61 : 170,413.88 = 75,729.47 : x
  2. Step 2: Convert to fraction form
    123,482.61/170,413.88 = 75,729.47/x
  3. Step 3: Cross multiply
    123,482.61x = 170,413.88 × 75,729.47
  4. Step 4: Simplify right side
    123,482.61x = 12,905,351,582.33
  5. Step 5: Solve for x
    x = 12,905,351,582.33/123,482.61
  6. Step 6: Final answer
    x = 104,511.49

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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.