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Finding the Fourth Proportional to 45,356.80, 68,030.40 and 14,190.40

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Solution

The fourth proportional to 45,356.80, 68,030.40 and 14,190.40 is: 21,284.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,356.80 : 68,030.40 = 14,190.40 : x
  2. Step 2: Convert to fraction form
    45,356.80/68,030.40 = 14,190.40/x
  3. Step 3: Cross multiply
    45,356.80x = 68,030.40 × 14,190.40
  4. Step 4: Simplify right side
    45,356.80x = 965,378,588.16
  5. Step 5: Solve for x
    x = 965,378,588.16/45,356.80
  6. Step 6: Final answer
    x = 21,284.10

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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.