Home / 212,955.72-319,118.00-86,442.02

Finding the Fourth Proportional to 212,955.72, 319,118.00 and 86,442.02

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Solution

The fourth proportional to 212,955.72, 319,118.00 and 86,442.02 is: 129,534.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,955.72 : 319,118.00 = 86,442.02 : x
  2. Step 2: Convert to fraction form
    212,955.72/319,118.00 = 86,442.02/x
  3. Step 3: Cross multiply
    212,955.72x = 319,118.00 × 86,442.02
  4. Step 4: Simplify right side
    212,955.72x = 27,585,202,510.56
  5. Step 5: Solve for x
    x = 27,585,202,510.56/212,955.72
  6. Step 6: Final answer
    x = 129,534.92

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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.