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Finding the Fourth Proportional to 139,476.47, 209,303.80 and 50,721.53

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Solution

The fourth proportional to 139,476.47, 209,303.80 and 50,721.53 is: 76,114.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,476.47 : 209,303.80 = 50,721.53 : x
  2. Step 2: Convert to fraction form
    139,476.47/209,303.80 = 50,721.53/x
  3. Step 3: Cross multiply
    139,476.47x = 209,303.80 × 50,721.53
  4. Step 4: Simplify right side
    139,476.47x = 10,616,207,797.49
  5. Step 5: Solve for x
    x = 10,616,207,797.49/139,476.47
  6. Step 6: Final answer
    x = 76,114.69

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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.