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Finding the Fourth Proportional to 139,012.38, 191,696.40 and 123,650.46

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Solution

The fourth proportional to 139,012.38, 191,696.40 and 123,650.46 is: 170,512.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,012.38 : 191,696.40 = 123,650.46 : x
  2. Step 2: Convert to fraction form
    139,012.38/191,696.40 = 123,650.46/x
  3. Step 3: Cross multiply
    139,012.38x = 191,696.40 × 123,650.46
  4. Step 4: Simplify right side
    139,012.38x = 23,703,348,040.34
  5. Step 5: Solve for x
    x = 23,703,348,040.34/139,012.38
  6. Step 6: Final answer
    x = 170,512.50

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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.