Home / 100,558.36-138,771.70-55,237.40

Finding the Fourth Proportional to 100,558.36, 138,771.70 and 55,237.40

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Solution

The fourth proportional to 100,558.36, 138,771.70 and 55,237.40 is: 76,228.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,558.36 : 138,771.70 = 55,237.40 : x
  2. Step 2: Convert to fraction form
    100,558.36/138,771.70 = 55,237.40/x
  3. Step 3: Cross multiply
    100,558.36x = 138,771.70 × 55,237.40
  4. Step 4: Simplify right side
    100,558.36x = 7,665,387,901.58
  5. Step 5: Solve for x
    x = 7,665,387,901.58/100,558.36
  6. Step 6: Final answer
    x = 76,228.25

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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.