Home / 212,739.78-319,165.02-79,630.50

Finding the Fourth Proportional to 212,739.78, 319,165.02 and 79,630.50

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Solution

The fourth proportional to 212,739.78, 319,165.02 and 79,630.50 is: 119,466.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,739.78 : 319,165.02 = 79,630.50 : x
  2. Step 2: Convert to fraction form
    212,739.78/319,165.02 = 79,630.50/x
  3. Step 3: Cross multiply
    212,739.78x = 319,165.02 × 79,630.50
  4. Step 4: Simplify right side
    212,739.78x = 25,415,270,125.11
  5. Step 5: Solve for x
    x = 25,415,270,125.11/212,739.78
  6. Step 6: Final answer
    x = 119,466.47

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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.