Home / 212,795.60-319,231.20-70,649.36

Finding the Fourth Proportional to 212,795.60, 319,231.20 and 70,649.36

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Solution

The fourth proportional to 212,795.60, 319,231.20 and 70,649.36 is: 105,986.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,795.60 : 319,231.20 = 70,649.36 : x
  2. Step 2: Convert to fraction form
    212,795.60/319,231.20 = 70,649.36/x
  3. Step 3: Cross multiply
    212,795.60x = 319,231.20 × 70,649.36
  4. Step 4: Simplify right side
    212,795.60x = 22,553,479,972.03
  5. Step 5: Solve for x
    x = 22,553,479,972.03/212,795.60
  6. Step 6: Final answer
    x = 105,986.59

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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.