Home / 212,905.60-319,358.40-142,403.20

Finding the Fourth Proportional to 212,905.60, 319,358.40 and 142,403.20

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Solution

The fourth proportional to 212,905.60, 319,358.40 and 142,403.20 is: 213,604.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,905.60 : 319,358.40 = 142,403.20 : x
  2. Step 2: Convert to fraction form
    212,905.60/319,358.40 = 142,403.20/x
  3. Step 3: Cross multiply
    212,905.60x = 319,358.40 × 142,403.20
  4. Step 4: Simplify right side
    212,905.60x = 45,477,658,106.88
  5. Step 5: Solve for x
    x = 45,477,658,106.88/212,905.60
  6. Step 6: Final answer
    x = 213,604.80

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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.