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Finding the Fourth Proportional to 70,641.64, 105,962.55 and 18,051.18

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Solution

The fourth proportional to 70,641.64, 105,962.55 and 18,051.18 is: 27,076.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,641.64 : 105,962.55 = 18,051.18 : x
  2. Step 2: Convert to fraction form
    70,641.64/105,962.55 = 18,051.18/x
  3. Step 3: Cross multiply
    70,641.64x = 105,962.55 × 18,051.18
  4. Step 4: Simplify right side
    70,641.64x = 1,912,749,063.31
  5. Step 5: Solve for x
    x = 1,912,749,063.31/70,641.64
  6. Step 6: Final answer
    x = 27,076.79

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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.