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Finding the Fourth Proportional to 139,458.81, 209,188.22 and 39,606.04

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Solution

The fourth proportional to 139,458.81, 209,188.22 and 39,606.04 is: 59,409.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,458.81 : 209,188.22 = 39,606.04 : x
  2. Step 2: Convert to fraction form
    139,458.81/209,188.22 = 39,606.04/x
  3. Step 3: Cross multiply
    139,458.81x = 209,188.22 × 39,606.04
  4. Step 4: Simplify right side
    139,458.81x = 8,285,116,706.75
  5. Step 5: Solve for x
    x = 8,285,116,706.75/139,458.81
  6. Step 6: Final answer
    x = 59,409.06

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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.