Home / 100,738.51-139,018.38-55,415.52

Finding the Fourth Proportional to 100,738.51, 139,018.38 and 55,415.52

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Solution

The fourth proportional to 100,738.51, 139,018.38 and 55,415.52 is: 76,473.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,738.51 : 139,018.38 = 55,415.52 : x
  2. Step 2: Convert to fraction form
    100,738.51/139,018.38 = 55,415.52/x
  3. Step 3: Cross multiply
    100,738.51x = 139,018.38 × 55,415.52
  4. Step 4: Simplify right side
    100,738.51x = 7,703,775,817.26
  5. Step 5: Solve for x
    x = 7,703,775,817.26/100,738.51
  6. Step 6: Final answer
    x = 76,473.00

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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.