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Finding the Fourth Proportional to 101,211.49, 139,672.97 and 55,889.38

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Solution

The fourth proportional to 101,211.49, 139,672.97 and 55,889.38 is: 77,127.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,211.49 : 139,672.97 = 55,889.38 : x
  2. Step 2: Convert to fraction form
    101,211.49/139,672.97 = 55,889.38/x
  3. Step 3: Cross multiply
    101,211.49x = 139,672.97 × 55,889.38
  4. Step 4: Simplify right side
    101,211.49x = 7,806,235,416.61
  5. Step 5: Solve for x
    x = 7,806,235,416.61/101,211.49
  6. Step 6: Final answer
    x = 77,127.96

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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.