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Finding the Fourth Proportional to 66,271.58, 91,419.92 and 39,394.96

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Solution

The fourth proportional to 66,271.58, 91,419.92 and 39,394.96 is: 54,344.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,271.58 : 91,419.92 = 39,394.96 : x
  2. Step 2: Convert to fraction form
    66,271.58/91,419.92 = 39,394.96/x
  3. Step 3: Cross multiply
    66,271.58x = 91,419.92 × 39,394.96
  4. Step 4: Simplify right side
    66,271.58x = 3,601,484,091.60
  5. Step 5: Solve for x
    x = 3,601,484,091.60/66,271.58
  6. Step 6: Final answer
    x = 54,344.32

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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.