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Finding the Fourth Proportional to 139,115.80, 208,598.18 and 63,172.64

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Solution

The fourth proportional to 139,115.80, 208,598.18 and 63,172.64 is: 94,724.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,115.80 : 208,598.18 = 63,172.64 : x
  2. Step 2: Convert to fraction form
    139,115.80/208,598.18 = 63,172.64/x
  3. Step 3: Cross multiply
    139,115.80x = 208,598.18 × 63,172.64
  4. Step 4: Simplify right side
    139,115.80x = 13,177,697,729.80
  5. Step 5: Solve for x
    x = 13,177,697,729.80/139,115.80
  6. Step 6: Final answer
    x = 94,724.67

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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.