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Finding the Fourth Proportional to 101,861, 140,561.70 and 56,539.88

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Solution

The fourth proportional to 101,861, 140,561.70 and 56,539.88 is: 78,021.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,861 : 140,561.70 = 56,539.88 : x
  2. Step 2: Convert to fraction form
    101,861/140,561.70 = 56,539.88/x
  3. Step 3: Cross multiply
    101,861x = 140,561.70 × 56,539.88
  4. Step 4: Simplify right side
    101,861x = 7,947,341,650.60
  5. Step 5: Solve for x
    x = 7,947,341,650.60/101,861
  6. Step 6: Final answer
    x = 78,021.44

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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.