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Finding the Fourth Proportional to 40,457.40, 60,621.30 and 25,639.80

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Solution

The fourth proportional to 40,457.40, 60,621.30 and 25,639.80 is: 38,418.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,457.40 : 60,621.30 = 25,639.80 : x
  2. Step 2: Convert to fraction form
    40,457.40/60,621.30 = 25,639.80/x
  3. Step 3: Cross multiply
    40,457.40x = 60,621.30 × 25,639.80
  4. Step 4: Simplify right side
    40,457.40x = 1,554,318,007.74
  5. Step 5: Solve for x
    x = 1,554,318,007.74/40,457.40
  6. Step 6: Final answer
    x = 38,418.63

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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.