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Finding the Fourth Proportional to 71,211.80, 98,268.31 and 38,940.01

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Solution

The fourth proportional to 71,211.80, 98,268.31 and 38,940.01 is: 53,735.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,211.80 : 98,268.31 = 38,940.01 : x
  2. Step 2: Convert to fraction form
    71,211.80/98,268.31 = 38,940.01/x
  3. Step 3: Cross multiply
    71,211.80x = 98,268.31 × 38,940.01
  4. Step 4: Simplify right side
    71,211.80x = 3,826,569,110.81
  5. Step 5: Solve for x
    x = 3,826,569,110.81/71,211.80
  6. Step 6: Final answer
    x = 53,735.05

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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.