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Finding the Fourth Proportional to 245,295.92, 338,509.32 and 137,870.48

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Solution

The fourth proportional to 245,295.92, 338,509.32 and 137,870.48 is: 190,261.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,295.92 : 338,509.32 = 137,870.48 : x
  2. Step 2: Convert to fraction form
    245,295.92/338,509.32 = 137,870.48/x
  3. Step 3: Cross multiply
    245,295.92x = 338,509.32 × 137,870.48
  4. Step 4: Simplify right side
    245,295.92x = 46,670,442,432.87
  5. Step 5: Solve for x
    x = 46,670,442,432.87/245,295.92
  6. Step 6: Final answer
    x = 190,261.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.