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Finding the Fourth Proportional to 139,706.98, 209,567.45 and 39,881.97

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Solution

The fourth proportional to 139,706.98, 209,567.45 and 39,881.97 is: 59,824.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,706.98 : 209,567.45 = 39,881.97 : x
  2. Step 2: Convert to fraction form
    139,706.98/209,567.45 = 39,881.97/x
  3. Step 3: Cross multiply
    139,706.98x = 209,567.45 × 39,881.97
  4. Step 4: Simplify right side
    139,706.98x = 8,357,962,853.58
  5. Step 5: Solve for x
    x = 8,357,962,853.58/139,706.98
  6. Step 6: Final answer
    x = 59,824.95

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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.