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Finding the Fourth Proportional to 71,208.64, 98,268.58 and 39,379.70

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Solution

The fourth proportional to 71,208.64, 98,268.58 and 39,379.70 is: 54,344.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,208.64 : 98,268.58 = 39,379.70 : x
  2. Step 2: Convert to fraction form
    71,208.64/98,268.58 = 39,379.70/x
  3. Step 3: Cross multiply
    71,208.64x = 98,268.58 × 39,379.70
  4. Step 4: Simplify right side
    71,208.64x = 3,869,787,199.83
  5. Step 5: Solve for x
    x = 3,869,787,199.83/71,208.64
  6. Step 6: Final answer
    x = 54,344.35

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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.