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Finding the Fourth Proportional to 45,430.40, 68,145.60 and 25,747.40

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Solution

The fourth proportional to 45,430.40, 68,145.60 and 25,747.40 is: 38,621.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,430.40 : 68,145.60 = 25,747.40 : x
  2. Step 2: Convert to fraction form
    45,430.40/68,145.60 = 25,747.40/x
  3. Step 3: Cross multiply
    45,430.40x = 68,145.60 × 25,747.40
  4. Step 4: Simplify right side
    45,430.40x = 1,754,572,021.44
  5. Step 5: Solve for x
    x = 1,754,572,021.44/45,430.40
  6. Step 6: Final answer
    x = 38,621.10

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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.