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Finding the Fourth Proportional to 139,570.87, 209,356.40 and 34,389.84

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Solution

The fourth proportional to 139,570.87, 209,356.40 and 34,389.84 is: 51,584.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,570.87 : 209,356.40 = 34,389.84 : x
  2. Step 2: Convert to fraction form
    139,570.87/209,356.40 = 34,389.84/x
  3. Step 3: Cross multiply
    139,570.87x = 209,356.40 × 34,389.84
  4. Step 4: Simplify right side
    139,570.87x = 7,199,732,052.19
  5. Step 5: Solve for x
    x = 7,199,732,052.19/139,570.87
  6. Step 6: Final answer
    x = 51,584.78

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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.