Home / 138,112.27-190,611.84-77,685.46

Finding the Fourth Proportional to 138,112.27, 190,611.84 and 77,685.46

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Solution

The fourth proportional to 138,112.27, 190,611.84 and 77,685.46 is: 107,215.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,112.27 : 190,611.84 = 77,685.46 : x
  2. Step 2: Convert to fraction form
    138,112.27/190,611.84 = 77,685.46/x
  3. Step 3: Cross multiply
    138,112.27x = 190,611.84 × 77,685.46
  4. Step 4: Simplify right side
    138,112.27x = 14,807,768,471.85
  5. Step 5: Solve for x
    x = 14,807,768,471.85/138,112.27
  6. Step 6: Final answer
    x = 107,215.44

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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.