Home / 285,974.21-428,964.35-86,296.35

Finding the Fourth Proportional to 285,974.21, 428,964.35 and 86,296.35

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Solution

The fourth proportional to 285,974.21, 428,964.35 and 86,296.35 is: 129,445.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,974.21 : 428,964.35 = 86,296.35 : x
  2. Step 2: Convert to fraction form
    285,974.21/428,964.35 = 86,296.35/x
  3. Step 3: Cross multiply
    285,974.21x = 428,964.35 × 86,296.35
  4. Step 4: Simplify right side
    285,974.21x = 37,018,058,973.27
  5. Step 5: Solve for x
    x = 37,018,058,973.27/285,974.21
  6. Step 6: Final answer
    x = 129,445.45

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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.