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Finding the Fourth Proportional to 139,713.55, 209,577.92 and 39,866.07

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Solution

The fourth proportional to 139,713.55, 209,577.92 and 39,866.07 is: 59,801.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,713.55 : 209,577.92 = 39,866.07 : x
  2. Step 2: Convert to fraction form
    139,713.55/209,577.92 = 39,866.07/x
  3. Step 3: Cross multiply
    139,713.55x = 209,577.92 × 39,866.07
  4. Step 4: Simplify right side
    139,713.55x = 8,355,048,029.17
  5. Step 5: Solve for x
    x = 8,355,048,029.17/139,713.55
  6. Step 6: Final answer
    x = 59,801.27

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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.