Home / 105,375.25-145,435.01-78,330.95

Finding the Fourth Proportional to 105,375.25, 145,435.01 and 78,330.95

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Solution

The fourth proportional to 105,375.25, 145,435.01 and 78,330.95 is: 108,109.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,375.25 : 145,435.01 = 78,330.95 : x
  2. Step 2: Convert to fraction form
    105,375.25/145,435.01 = 78,330.95/x
  3. Step 3: Cross multiply
    105,375.25x = 145,435.01 × 78,330.95
  4. Step 4: Simplify right side
    105,375.25x = 11,392,062,496.56
  5. Step 5: Solve for x
    x = 11,392,062,496.56/105,375.25
  6. Step 6: Final answer
    x = 108,109.47

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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.