Home / 212,582.32-318,484.60-100,355.28

Finding the Fourth Proportional to 212,582.32, 318,484.60 and 100,355.28

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Solution

The fourth proportional to 212,582.32, 318,484.60 and 100,355.28 is: 150,349.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,582.32 : 318,484.60 = 100,355.28 : x
  2. Step 2: Convert to fraction form
    212,582.32/318,484.60 = 100,355.28/x
  3. Step 3: Cross multiply
    212,582.32x = 318,484.60 × 100,355.28
  4. Step 4: Simplify right side
    212,582.32x = 31,961,611,208.69
  5. Step 5: Solve for x
    x = 31,961,611,208.69/212,582.32
  6. Step 6: Final answer
    x = 150,349.34

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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.