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Finding the Fourth Proportional to 285,420.40, 428,135.40 and 108,010.96

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Solution

The fourth proportional to 285,420.40, 428,135.40 and 108,010.96 is: 162,018.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,420.40 : 428,135.40 = 108,010.96 : x
  2. Step 2: Convert to fraction form
    285,420.40/428,135.40 = 108,010.96/x
  3. Step 3: Cross multiply
    285,420.40x = 428,135.40 × 108,010.96
  4. Step 4: Simplify right side
    285,420.40x = 46,243,315,563.98
  5. Step 5: Solve for x
    x = 46,243,315,563.98/285,420.40
  6. Step 6: Final answer
    x = 162,018.26

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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.