Home / 100,851.20-151,017.60-74,412.80

Finding the Fourth Proportional to 100,851.20, 151,017.60 and 74,412.80

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Solution

The fourth proportional to 100,851.20, 151,017.60 and 74,412.80 is: 111,427.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,851.20 : 151,017.60 = 74,412.80 : x
  2. Step 2: Convert to fraction form
    100,851.20/151,017.60 = 74,412.80/x
  3. Step 3: Cross multiply
    100,851.20x = 151,017.60 × 74,412.80
  4. Step 4: Simplify right side
    100,851.20x = 11,237,642,465.28
  5. Step 5: Solve for x
    x = 11,237,642,465.28/100,851.20
  6. Step 6: Final answer
    x = 111,427.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.