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Finding the Fourth Proportional to 70,063.54, 105,136.85 and 65,630.51

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Solution

The fourth proportional to 70,063.54, 105,136.85 and 65,630.51 is: 98,484.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,063.54 : 105,136.85 = 65,630.51 : x
  2. Step 2: Convert to fraction form
    70,063.54/105,136.85 = 65,630.51/x
  3. Step 3: Cross multiply
    70,063.54x = 105,136.85 × 65,630.51
  4. Step 4: Simplify right side
    70,063.54x = 6,900,184,625.72
  5. Step 5: Solve for x
    x = 6,900,184,625.72/70,063.54
  6. Step 6: Final answer
    x = 98,484.67

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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.