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Finding the Fourth Proportional to 101,169, 139,615.45 and 55,846.87

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Solution

The fourth proportional to 101,169, 139,615.45 and 55,846.87 is: 77,069.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,169 : 139,615.45 = 55,846.87 : x
  2. Step 2: Convert to fraction form
    101,169/139,615.45 = 55,846.87/x
  3. Step 3: Cross multiply
    101,169x = 139,615.45 × 55,846.87
  4. Step 4: Simplify right side
    101,169x = 7,797,085,397.49
  5. Step 5: Solve for x
    x = 7,797,085,397.49/101,169
  6. Step 6: Final answer
    x = 77,069.91

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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.