Home / 126,939.40-190,178.70-103,438.60

Finding the Fourth Proportional to 126,939.40, 190,178.70 and 103,438.60

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Solution

The fourth proportional to 126,939.40, 190,178.70 and 103,438.60 is: 154,970.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,939.40 : 190,178.70 = 103,438.60 : x
  2. Step 2: Convert to fraction form
    126,939.40/190,178.70 = 103,438.60/x
  3. Step 3: Cross multiply
    126,939.40x = 190,178.70 × 103,438.60
  4. Step 4: Simplify right side
    126,939.40x = 19,671,818,477.82
  5. Step 5: Solve for x
    x = 19,671,818,477.82/126,939.40
  6. Step 6: Final answer
    x = 154,970.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.