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Finding the Fourth Proportional to 101,449.20, 139,914.90 and 76,015.29

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Solution

The fourth proportional to 101,449.20, 139,914.90 and 76,015.29 is: 104,837.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,449.20 : 139,914.90 = 76,015.29 : x
  2. Step 2: Convert to fraction form
    101,449.20/139,914.90 = 76,015.29/x
  3. Step 3: Cross multiply
    101,449.20x = 139,914.90 × 76,015.29
  4. Step 4: Simplify right side
    101,449.20x = 10,635,671,698.82
  5. Step 5: Solve for x
    x = 10,635,671,698.82/101,449.20
  6. Step 6: Final answer
    x = 104,837.41

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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.