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Finding the Fourth Proportional to 68,417.43, 102,623.10 and 21,030.60

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Solution

The fourth proportional to 68,417.43, 102,623.10 and 21,030.60 is: 31,544.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,417.43 : 102,623.10 = 21,030.60 : x
  2. Step 2: Convert to fraction form
    68,417.43/102,623.10 = 21,030.60/x
  3. Step 3: Cross multiply
    68,417.43x = 102,623.10 × 21,030.60
  4. Step 4: Simplify right side
    68,417.43x = 2,158,225,366.86
  5. Step 5: Solve for x
    x = 2,158,225,366.86/68,417.43
  6. Step 6: Final answer
    x = 31,544.96

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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.