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Finding the Fourth Proportional to 53,615.40, 80,423.10 and 40,309.80

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Solution

The fourth proportional to 53,615.40, 80,423.10 and 40,309.80 is: 60,464.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,615.40 : 80,423.10 = 40,309.80 : x
  2. Step 2: Convert to fraction form
    53,615.40/80,423.10 = 40,309.80/x
  3. Step 3: Cross multiply
    53,615.40x = 80,423.10 × 40,309.80
  4. Step 4: Simplify right side
    53,615.40x = 3,241,839,076.38
  5. Step 5: Solve for x
    x = 3,241,839,076.38/53,615.40
  6. Step 6: Final answer
    x = 60,464.70

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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.