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Finding the Fourth Proportional to 101,709.56, 140,355.06 and 56,388.20

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Solution

The fourth proportional to 101,709.56, 140,355.06 and 56,388.20 is: 77,813.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,709.56 : 140,355.06 = 56,388.20 : x
  2. Step 2: Convert to fraction form
    101,709.56/140,355.06 = 56,388.20/x
  3. Step 3: Cross multiply
    101,709.56x = 140,355.06 × 56,388.20
  4. Step 4: Simplify right side
    101,709.56x = 7,914,369,194.29
  5. Step 5: Solve for x
    x = 7,914,369,194.29/101,709.56
  6. Step 6: Final answer
    x = 77,813.42

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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.