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Finding the Fourth Proportional to 68,420.40, 102,544.20 and 60,644.40

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Solution

The fourth proportional to 68,420.40, 102,544.20 and 60,644.40 is: 90,890.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,420.40 : 102,544.20 = 60,644.40 : x
  2. Step 2: Convert to fraction form
    68,420.40/102,544.20 = 60,644.40/x
  3. Step 3: Cross multiply
    68,420.40x = 102,544.20 × 60,644.40
  4. Step 4: Simplify right side
    68,420.40x = 6,218,731,482.48
  5. Step 5: Solve for x
    x = 6,218,731,482.48/68,420.40
  6. Step 6: Final answer
    x = 90,890.02

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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.