Home / 100,818.21-139,128.06-55,495.22

Finding the Fourth Proportional to 100,818.21, 139,128.06 and 55,495.22

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Solution

The fourth proportional to 100,818.21, 139,128.06 and 55,495.22 is: 76,582.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,818.21 : 139,128.06 = 55,495.22 : x
  2. Step 2: Convert to fraction form
    100,818.21/139,128.06 = 55,495.22/x
  3. Step 3: Cross multiply
    100,818.21x = 139,128.06 × 55,495.22
  4. Step 4: Simplify right side
    100,818.21x = 7,720,941,602.23
  5. Step 5: Solve for x
    x = 7,720,941,602.23/100,818.21
  6. Step 6: Final answer
    x = 76,582.81

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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.