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Finding the Fourth Proportional to 101,022.81, 139,354.40 and 63,231.45

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Solution

The fourth proportional to 101,022.81, 139,354.40 and 63,231.45 is: 87,223.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,022.81 : 139,354.40 = 63,231.45 : x
  2. Step 2: Convert to fraction form
    101,022.81/139,354.40 = 63,231.45/x
  3. Step 3: Cross multiply
    101,022.81x = 139,354.40 × 63,231.45
  4. Step 4: Simplify right side
    101,022.81x = 8,811,580,459.72
  5. Step 5: Solve for x
    x = 8,811,580,459.72/101,022.81
  6. Step 6: Final answer
    x = 87,223.67

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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.