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Finding the Fourth Proportional to 139,599.72, 209,395.80 and 34,419.60

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Solution

The fourth proportional to 139,599.72, 209,395.80 and 34,419.60 is: 51,628.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,599.72 : 209,395.80 = 34,419.60 : x
  2. Step 2: Convert to fraction form
    139,599.72/209,395.80 = 34,419.60/x
  3. Step 3: Cross multiply
    139,599.72x = 209,395.80 × 34,419.60
  4. Step 4: Simplify right side
    139,599.72x = 7,207,319,677.68
  5. Step 5: Solve for x
    x = 7,207,319,677.68/139,599.72
  6. Step 6: Final answer
    x = 51,628.47

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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.