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Finding the Fourth Proportional to 70,063.12, 105,136.20 and 65,630.09

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Solution

The fourth proportional to 70,063.12, 105,136.20 and 65,630.09 is: 98,484.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,063.12 : 105,136.20 = 65,630.09 : x
  2. Step 2: Convert to fraction form
    70,063.12/105,136.20 = 65,630.09/x
  3. Step 3: Cross multiply
    70,063.12x = 105,136.20 × 65,630.09
  4. Step 4: Simplify right side
    70,063.12x = 6,900,097,890.72
  5. Step 5: Solve for x
    x = 6,900,097,890.72/70,063.12
  6. Step 6: Final answer
    x = 98,484.03

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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.