Home / 100,190.76-138,263.26-55,478.76

Finding the Fourth Proportional to 100,190.76, 138,263.26 and 55,478.76

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Solution

The fourth proportional to 100,190.76, 138,263.26 and 55,478.76 is: 76,560.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,190.76 : 138,263.26 = 55,478.76 : x
  2. Step 2: Convert to fraction form
    100,190.76/138,263.26 = 55,478.76/x
  3. Step 3: Cross multiply
    100,190.76x = 138,263.26 × 55,478.76
  4. Step 4: Simplify right side
    100,190.76x = 7,670,674,218.36
  5. Step 5: Solve for x
    x = 7,670,674,218.36/100,190.76
  6. Step 6: Final answer
    x = 76,560.70

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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.