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Finding the Fourth Proportional to 57,866.70, 86,886.45 and 40,413.90

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Solution

The fourth proportional to 57,866.70, 86,886.45 and 40,413.90 is: 60,681.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,866.70 : 86,886.45 = 40,413.90 : x
  2. Step 2: Convert to fraction form
    57,866.70/86,886.45 = 40,413.90/x
  3. Step 3: Cross multiply
    57,866.70x = 86,886.45 × 40,413.90
  4. Step 4: Simplify right side
    57,866.70x = 3,511,420,301.66
  5. Step 5: Solve for x
    x = 3,511,420,301.66/57,866.70
  6. Step 6: Final answer
    x = 60,681.19

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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.