Home / 212,427.36-318,670.20-72,148.32

Finding the Fourth Proportional to 212,427.36, 318,670.20 and 72,148.32

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Solution

The fourth proportional to 212,427.36, 318,670.20 and 72,148.32 is: 108,232.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,427.36 : 318,670.20 = 72,148.32 : x
  2. Step 2: Convert to fraction form
    212,427.36/318,670.20 = 72,148.32/x
  3. Step 3: Cross multiply
    212,427.36x = 318,670.20 × 72,148.32
  4. Step 4: Simplify right side
    212,427.36x = 22,991,519,564.06
  5. Step 5: Solve for x
    x = 22,991,519,564.06/212,427.36
  6. Step 6: Final answer
    x = 108,232.38

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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.