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Finding the Fourth Proportional to 72,653.84, 108,987 and 20,063.32

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Solution

The fourth proportional to 72,653.84, 108,987 and 20,063.32 is: 30,096.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,653.84 : 108,987 = 20,063.32 : x
  2. Step 2: Convert to fraction form
    72,653.84/108,987 = 20,063.32/x
  3. Step 3: Cross multiply
    72,653.84x = 108,987 × 20,063.32
  4. Step 4: Simplify right side
    72,653.84x = 2,186,641,056.84
  5. Step 5: Solve for x
    x = 2,186,641,056.84/72,653.84
  6. Step 6: Final answer
    x = 30,096.70

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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.