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Finding the Fourth Proportional to 72,674.80, 109,081.80 and 37,639.60

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Solution

The fourth proportional to 72,674.80, 109,081.80 and 37,639.60 is: 56,495.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,674.80 : 109,081.80 = 37,639.60 : x
  2. Step 2: Convert to fraction form
    72,674.80/109,081.80 = 37,639.60/x
  3. Step 3: Cross multiply
    72,674.80x = 109,081.80 × 37,639.60
  4. Step 4: Simplify right side
    72,674.80x = 4,105,795,319.28
  5. Step 5: Solve for x
    x = 4,105,795,319.28/72,674.80
  6. Step 6: Final answer
    x = 56,495.45

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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.