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Finding the Fourth Proportional to 68,343.69, 102,518.62 and 20,955.32

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Solution

The fourth proportional to 68,343.69, 102,518.62 and 20,955.32 is: 31,433.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,343.69 : 102,518.62 = 20,955.32 : x
  2. Step 2: Convert to fraction form
    68,343.69/102,518.62 = 20,955.32/x
  3. Step 3: Cross multiply
    68,343.69x = 102,518.62 × 20,955.32
  4. Step 4: Simplify right side
    68,343.69x = 2,148,310,654.79
  5. Step 5: Solve for x
    x = 2,148,310,654.79/68,343.69
  6. Step 6: Final answer
    x = 31,433.93

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1.5x scale

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.