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Finding the Fourth Proportional to 45,439.40, 68,134.80 and 19,114.40

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Solution

The fourth proportional to 45,439.40, 68,134.80 and 19,114.40 is: 28,661.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,439.40 : 68,134.80 = 19,114.40 : x
  2. Step 2: Convert to fraction form
    45,439.40/68,134.80 = 19,114.40/x
  3. Step 3: Cross multiply
    45,439.40x = 68,134.80 × 19,114.40
  4. Step 4: Simplify right side
    45,439.40x = 1,302,355,821.12
  5. Step 5: Solve for x
    x = 1,302,355,821.12/45,439.40
  6. Step 6: Final answer
    x = 28,661.38

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1.5x scale

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.