Home / 138,396.12-190,947.12-77,945.60

Finding the Fourth Proportional to 138,396.12, 190,947.12 and 77,945.60

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Solution

The fourth proportional to 138,396.12, 190,947.12 and 77,945.60 is: 107,542.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,396.12 : 190,947.12 = 77,945.60 : x
  2. Step 2: Convert to fraction form
    138,396.12/190,947.12 = 77,945.60/x
  3. Step 3: Cross multiply
    138,396.12x = 190,947.12 × 77,945.60
  4. Step 4: Simplify right side
    138,396.12x = 14,883,487,836.67
  5. Step 5: Solve for x
    x = 14,883,487,836.67/138,396.12
  6. Step 6: Final answer
    x = 107,542.67

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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.