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Finding the Fourth Proportional to 86,740.64, 119,700.72 and 49,012.64

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Solution

The fourth proportional to 86,740.64, 119,700.72 and 49,012.64 is: 67,636.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,740.64 : 119,700.72 = 49,012.64 : x
  2. Step 2: Convert to fraction form
    86,740.64/119,700.72 = 49,012.64/x
  3. Step 3: Cross multiply
    86,740.64x = 119,700.72 × 49,012.64
  4. Step 4: Simplify right side
    86,740.64x = 5,866,848,297.10
  5. Step 5: Solve for x
    x = 5,866,848,297.10/86,740.64
  6. Step 6: Final answer
    x = 67,636.67

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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.