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Finding the Fourth Proportional to 101,044.70, 139,454.69 and 84,019.67

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Solution

The fourth proportional to 101,044.70, 139,454.69 and 84,019.67 is: 115,957.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,044.70 : 139,454.69 = 84,019.67 : x
  2. Step 2: Convert to fraction form
    101,044.70/139,454.69 = 84,019.67/x
  3. Step 3: Cross multiply
    101,044.70x = 139,454.69 × 84,019.67
  4. Step 4: Simplify right side
    101,044.70x = 11,716,937,033.75
  5. Step 5: Solve for x
    x = 11,716,937,033.75/101,044.70
  6. Step 6: Final answer
    x = 115,957.96

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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.