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Finding the Fourth Proportional to 139,759.68, 209,600.64 and 46,272.72

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Solution

The fourth proportional to 139,759.68, 209,600.64 and 46,272.72 is: 69,396.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,759.68 : 209,600.64 = 46,272.72 : x
  2. Step 2: Convert to fraction form
    139,759.68/209,600.64 = 46,272.72/x
  3. Step 3: Cross multiply
    139,759.68x = 209,600.64 × 46,272.72
  4. Step 4: Simplify right side
    139,759.68x = 9,698,791,726.54
  5. Step 5: Solve for x
    x = 9,698,791,726.54/139,759.68
  6. Step 6: Final answer
    x = 69,396.21

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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.