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Finding the Fourth Proportional to 101,057.58, 139,457.70 and 55,739.79

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Solution

The fourth proportional to 101,057.58, 139,457.70 and 55,739.79 is: 76,919.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,057.58 : 139,457.70 = 55,739.79 : x
  2. Step 2: Convert to fraction form
    101,057.58/139,457.70 = 55,739.79/x
  3. Step 3: Cross multiply
    101,057.58x = 139,457.70 × 55,739.79
  4. Step 4: Simplify right side
    101,057.58x = 7,773,342,911.88
  5. Step 5: Solve for x
    x = 7,773,342,911.88/101,057.58
  6. Step 6: Final answer
    x = 76,919.94

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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.