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Finding the Fourth Proportional to 74,118.80, 102,214.84 and 68,614.40

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Solution

The fourth proportional to 74,118.80, 102,214.84 and 68,614.40 is: 94,623.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,118.80 : 102,214.84 = 68,614.40 : x
  2. Step 2: Convert to fraction form
    74,118.80/102,214.84 = 68,614.40/x
  3. Step 3: Cross multiply
    74,118.80x = 102,214.84 × 68,614.40
  4. Step 4: Simplify right side
    74,118.80x = 7,013,409,917.70
  5. Step 5: Solve for x
    x = 7,013,409,917.70/74,118.80
  6. Step 6: Final answer
    x = 94,623.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.