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Finding the Fourth Proportional to 66,987.56, 92,413.50 and 38,676.44

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Solution

The fourth proportional to 66,987.56, 92,413.50 and 38,676.44 is: 53,356.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,987.56 : 92,413.50 = 38,676.44 : x
  2. Step 2: Convert to fraction form
    66,987.56/92,413.50 = 38,676.44/x
  3. Step 3: Cross multiply
    66,987.56x = 92,413.50 × 38,676.44
  4. Step 4: Simplify right side
    66,987.56x = 3,574,225,187.94
  5. Step 5: Solve for x
    x = 3,574,225,187.94/66,987.56
  6. Step 6: Final answer
    x = 53,356.55

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1.5x scale

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.