Home / 100,303.21-138,167.46-76,388.37

Finding the Fourth Proportional to 100,303.21, 138,167.46 and 76,388.37

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Solution

The fourth proportional to 100,303.21, 138,167.46 and 76,388.37 is: 105,224.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,303.21 : 138,167.46 = 76,388.37 : x
  2. Step 2: Convert to fraction form
    100,303.21/138,167.46 = 76,388.37/x
  3. Step 3: Cross multiply
    100,303.21x = 138,167.46 × 76,388.37
  4. Step 4: Simplify right side
    100,303.21x = 10,554,387,056.44
  5. Step 5: Solve for x
    x = 10,554,387,056.44/100,303.21
  6. Step 6: Final answer
    x = 105,224.82

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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.