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Finding the Fourth Proportional to 101,891.72, 140,611.80 and 56,570.60

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Solution

The fourth proportional to 101,891.72, 140,611.80 and 56,570.60 is: 78,068.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,891.72 : 140,611.80 = 56,570.60 : x
  2. Step 2: Convert to fraction form
    101,891.72/140,611.80 = 56,570.60/x
  3. Step 3: Cross multiply
    101,891.72x = 140,611.80 × 56,570.60
  4. Step 4: Simplify right side
    101,891.72x = 7,954,493,893.08
  5. Step 5: Solve for x
    x = 7,954,493,893.08/101,891.72
  6. Step 6: Final answer
    x = 78,068.11

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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.