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Finding the Fourth Proportional to 101,143.29, 139,576.77 and 55,821.72

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Solution

The fourth proportional to 101,143.29, 139,576.77 and 55,821.72 is: 77,033.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,143.29 : 139,576.77 = 55,821.72 : x
  2. Step 2: Convert to fraction form
    101,143.29/139,576.77 = 55,821.72/x
  3. Step 3: Cross multiply
    101,143.29x = 139,576.77 × 55,821.72
  4. Step 4: Simplify right side
    101,143.29x = 7,791,415,373.44
  5. Step 5: Solve for x
    x = 7,791,415,373.44/101,143.29
  6. Step 6: Final answer
    x = 77,033.44

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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.