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Finding the Fourth Proportional to 139,643.32, 209,433.42 and 39,801.36

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Solution

The fourth proportional to 139,643.32, 209,433.42 and 39,801.36 is: 59,693.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,643.32 : 209,433.42 = 39,801.36 : x
  2. Step 2: Convert to fraction form
    139,643.32/209,433.42 = 39,801.36/x
  3. Step 3: Cross multiply
    139,643.32x = 209,433.42 × 39,801.36
  4. Step 4: Simplify right side
    139,643.32x = 8,335,734,945.45
  5. Step 5: Solve for x
    x = 8,335,734,945.45/139,643.32
  6. Step 6: Final answer
    x = 59,693.04

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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.