Home / 100,782.40-139,076.77-55,460.37

Finding the Fourth Proportional to 100,782.40, 139,076.77 and 55,460.37

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Solution

The fourth proportional to 100,782.40, 139,076.77 and 55,460.37 is: 76,533.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,782.40 : 139,076.77 = 55,460.37 : x
  2. Step 2: Convert to fraction form
    100,782.40/139,076.77 = 55,460.37/x
  3. Step 3: Cross multiply
    100,782.40x = 139,076.77 × 55,460.37
  4. Step 4: Simplify right side
    100,782.40x = 7,713,249,122.60
  5. Step 5: Solve for x
    x = 7,713,249,122.60/100,782.40
  6. Step 6: Final answer
    x = 76,533.69

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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.