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Finding the Fourth Proportional to 139,969.70, 209,954.55 and 137,053.70

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Solution

The fourth proportional to 139,969.70, 209,954.55 and 137,053.70 is: 205,580.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969.70 : 209,954.55 = 137,053.70 : x
  2. Step 2: Convert to fraction form
    139,969.70/209,954.55 = 137,053.70/x
  3. Step 3: Cross multiply
    139,969.70x = 209,954.55 × 137,053.70
  4. Step 4: Simplify right side
    139,969.70x = 28,775,047,909.34
  5. Step 5: Solve for x
    x = 28,775,047,909.34/139,969.70
  6. Step 6: Final answer
    x = 205,580.55

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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.