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Finding the Fourth Proportional to 136,693.20, 205,039.80 and 62,821.20

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Solution

The fourth proportional to 136,693.20, 205,039.80 and 62,821.20 is: 94,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,693.20 : 205,039.80 = 62,821.20 : x
  2. Step 2: Convert to fraction form
    136,693.20/205,039.80 = 62,821.20/x
  3. Step 3: Cross multiply
    136,693.20x = 205,039.80 × 62,821.20
  4. Step 4: Simplify right side
    136,693.20x = 12,880,846,283.76
  5. Step 5: Solve for x
    x = 12,880,846,283.76/136,693.20
  6. Step 6: Final answer
    x = 94,231.80

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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.