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Finding the Fourth Proportional to 100,995.48, 139,373.74 and 55,674.22

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Solution

The fourth proportional to 100,995.48, 139,373.74 and 55,674.22 is: 76,830.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,995.48 : 139,373.74 = 55,674.22 : x
  2. Step 2: Convert to fraction form
    100,995.48/139,373.74 = 55,674.22/x
  3. Step 3: Cross multiply
    100,995.48x = 139,373.74 × 55,674.22
  4. Step 4: Simplify right side
    100,995.48x = 7,759,524,262.98
  5. Step 5: Solve for x
    x = 7,759,524,262.98/100,995.48
  6. Step 6: Final answer
    x = 76,830.41

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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.