Home / 212,848.40-319,315.80-72,621.20

Finding the Fourth Proportional to 212,848.40, 319,315.80 and 72,621.20

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Solution

The fourth proportional to 212,848.40, 319,315.80 and 72,621.20 is: 108,946.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,848.40 : 319,315.80 = 72,621.20 : x
  2. Step 2: Convert to fraction form
    212,848.40/319,315.80 = 72,621.20/x
  3. Step 3: Cross multiply
    212,848.40x = 319,315.80 × 72,621.20
  4. Step 4: Simplify right side
    212,848.40x = 23,189,096,574.96
  5. Step 5: Solve for x
    x = 23,189,096,574.96/212,848.40
  6. Step 6: Final answer
    x = 108,946.54

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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.