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Finding the Fourth Proportional to 205,605.10, 308,522.85 and 87,256.30

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Solution

The fourth proportional to 205,605.10, 308,522.85 and 87,256.30 is: 130,933.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,605.10 : 308,522.85 = 87,256.30 : x
  2. Step 2: Convert to fraction form
    205,605.10/308,522.85 = 87,256.30/x
  3. Step 3: Cross multiply
    205,605.10x = 308,522.85 × 87,256.30
  4. Step 4: Simplify right side
    205,605.10x = 26,920,562,356.46
  5. Step 5: Solve for x
    x = 26,920,562,356.46/205,605.10
  6. Step 6: Final answer
    x = 130,933.34

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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.