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Finding the Fourth Proportional to 101,047.50, 139,443.68 and 55,729.67

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Solution

The fourth proportional to 101,047.50, 139,443.68 and 55,729.67 is: 76,905.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,047.50 : 139,443.68 = 55,729.67 : x
  2. Step 2: Convert to fraction form
    101,047.50/139,443.68 = 55,729.67/x
  3. Step 3: Cross multiply
    101,047.50x = 139,443.68 × 55,729.67
  4. Step 4: Simplify right side
    101,047.50x = 7,771,149,712.09
  5. Step 5: Solve for x
    x = 7,771,149,712.09/101,047.50
  6. Step 6: Final answer
    x = 76,905.91

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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.