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Finding the Fourth Proportional to 139,701.36, 209,584.56 and 39,862.92

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Solution

The fourth proportional to 139,701.36, 209,584.56 and 39,862.92 is: 59,803.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,701.36 : 209,584.56 = 39,862.92 : x
  2. Step 2: Convert to fraction form
    139,701.36/209,584.56 = 39,862.92/x
  3. Step 3: Cross multiply
    139,701.36x = 209,584.56 × 39,862.92
  4. Step 4: Simplify right side
    139,701.36x = 8,354,652,548.52
  5. Step 5: Solve for x
    x = 8,354,652,548.52/139,701.36
  6. Step 6: Final answer
    x = 59,803.66

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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.