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Finding the Fourth Proportional to 139,121.64, 208,215.90 and 114,160.68

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Solution

The fourth proportional to 139,121.64, 208,215.90 and 114,160.68 is: 170,858.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,121.64 : 208,215.90 = 114,160.68 : x
  2. Step 2: Convert to fraction form
    139,121.64/208,215.90 = 114,160.68/x
  3. Step 3: Cross multiply
    139,121.64x = 208,215.90 × 114,160.68
  4. Step 4: Simplify right side
    139,121.64x = 23,770,068,730.81
  5. Step 5: Solve for x
    x = 23,770,068,730.81/139,121.64
  6. Step 6: Final answer
    x = 170,858.17

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1.5x scale

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.