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Finding the Fourth Proportional to 57,620, 79,515.60 and 32,470.40

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Solution

The fourth proportional to 57,620, 79,515.60 and 32,470.40 is: 44,809.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,620 : 79,515.60 = 32,470.40 : x
  2. Step 2: Convert to fraction form
    57,620/79,515.60 = 32,470.40/x
  3. Step 3: Cross multiply
    57,620x = 79,515.60 × 32,470.40
  4. Step 4: Simplify right side
    57,620x = 2,581,903,338.24
  5. Step 5: Solve for x
    x = 2,581,903,338.24/57,620
  6. Step 6: Final answer
    x = 44,809.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.