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Finding the Fourth Proportional to 100,850.88, 139,168.80 and 56,136

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Solution

The fourth proportional to 100,850.88, 139,168.80 and 56,136 is: 77,464.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,850.88 : 139,168.80 = 56,136 : x
  2. Step 2: Convert to fraction form
    100,850.88/139,168.80 = 56,136/x
  3. Step 3: Cross multiply
    100,850.88x = 139,168.80 × 56,136
  4. Step 4: Simplify right side
    100,850.88x = 7,812,379,756.80
  5. Step 5: Solve for x
    x = 7,812,379,756.80/100,850.88
  6. Step 6: Final answer
    x = 77,464.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.