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Finding the Fourth Proportional to 285,518.10, 428,299.02 and 75,153

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Solution

The fourth proportional to 285,518.10, 428,299.02 and 75,153 is: 112,735.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,518.10 : 428,299.02 = 75,153 : x
  2. Step 2: Convert to fraction form
    285,518.10/428,299.02 = 75,153/x
  3. Step 3: Cross multiply
    285,518.10x = 428,299.02 × 75,153
  4. Step 4: Simplify right side
    285,518.10x = 32,187,956,250.06
  5. Step 5: Solve for x
    x = 32,187,956,250.06/285,518.10
  6. Step 6: Final answer
    x = 112,735.26

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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.