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Finding the Fourth Proportional to 45,400.60, 68,100.90 and 40,389.40

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Solution

The fourth proportional to 45,400.60, 68,100.90 and 40,389.40 is: 60,584.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,400.60 : 68,100.90 = 40,389.40 : x
  2. Step 2: Convert to fraction form
    45,400.60/68,100.90 = 40,389.40/x
  3. Step 3: Cross multiply
    45,400.60x = 68,100.90 × 40,389.40
  4. Step 4: Simplify right side
    45,400.60x = 2,750,554,490.46
  5. Step 5: Solve for x
    x = 2,750,554,490.46/45,400.60
  6. Step 6: Final answer
    x = 60,584.10

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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.