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Finding the Fourth Proportional to 45,290.60, 67,938.90 and 12,010.20

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Solution

The fourth proportional to 45,290.60, 67,938.90 and 12,010.20 is: 18,016.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,290.60 : 67,938.90 = 12,010.20 : x
  2. Step 2: Convert to fraction form
    45,290.60/67,938.90 = 12,010.20/x
  3. Step 3: Cross multiply
    45,290.60x = 67,938.90 × 12,010.20
  4. Step 4: Simplify right side
    45,290.60x = 815,959,776.78
  5. Step 5: Solve for x
    x = 815,959,776.78/45,290.60
  6. Step 6: Final answer
    x = 18,016.10

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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.