Home / 100,905.30-139,250.47-55,582.36

Finding the Fourth Proportional to 100,905.30, 139,250.47 and 55,582.36

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Solution

The fourth proportional to 100,905.30, 139,250.47 and 55,582.36 is: 76,704.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,905.30 : 139,250.47 = 55,582.36 : x
  2. Step 2: Convert to fraction form
    100,905.30/139,250.47 = 55,582.36/x
  3. Step 3: Cross multiply
    100,905.30x = 139,250.47 × 55,582.36
  4. Step 4: Simplify right side
    100,905.30x = 7,739,869,753.71
  5. Step 5: Solve for x
    x = 7,739,869,753.71/100,905.30
  6. Step 6: Final answer
    x = 76,704.29

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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.