Home / 212,764.76-319,220.04-72,621.80

Finding the Fourth Proportional to 212,764.76, 319,220.04 and 72,621.80

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Solution

The fourth proportional to 212,764.76, 319,220.04 and 72,621.80 is: 108,957.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,764.76 : 319,220.04 = 72,621.80 : x
  2. Step 2: Convert to fraction form
    212,764.76/319,220.04 = 72,621.80/x
  3. Step 3: Cross multiply
    212,764.76x = 319,220.04 × 72,621.80
  4. Step 4: Simplify right side
    212,764.76x = 23,182,333,900.87
  5. Step 5: Solve for x
    x = 23,182,333,900.87/212,764.76
  6. Step 6: Final answer
    x = 108,957.58

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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.