Home / 100,726.89-139,003.40-55,409.52

Finding the Fourth Proportional to 100,726.89, 139,003.40 and 55,409.52

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Solution

The fourth proportional to 100,726.89, 139,003.40 and 55,409.52 is: 76,465.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,726.89 : 139,003.40 = 55,409.52 : x
  2. Step 2: Convert to fraction form
    100,726.89/139,003.40 = 55,409.52/x
  3. Step 3: Cross multiply
    100,726.89x = 139,003.40 × 55,409.52
  4. Step 4: Simplify right side
    100,726.89x = 7,702,111,810.89
  5. Step 5: Solve for x
    x = 7,702,111,810.89/100,726.89
  6. Step 6: Final answer
    x = 76,465.30

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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.