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Finding the Fourth Proportional to 245,377.64, 338,619.12 and 137,948.15

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Solution

The fourth proportional to 245,377.64, 338,619.12 and 137,948.15 is: 190,367.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,377.64 : 338,619.12 = 137,948.15 : x
  2. Step 2: Convert to fraction form
    245,377.64/338,619.12 = 137,948.15/x
  3. Step 3: Cross multiply
    245,377.64x = 338,619.12 × 137,948.15
  4. Step 4: Simplify right side
    245,377.64x = 46,711,879,465.53
  5. Step 5: Solve for x
    x = 46,711,879,465.53/245,377.64
  6. Step 6: Final answer
    x = 190,367.31

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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.