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Finding the Fourth Proportional to 245,519.79, 338,793.39 and 138,087.57

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Solution

The fourth proportional to 245,519.79, 338,793.39 and 138,087.57 is: 190,547.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,519.79 : 338,793.39 = 138,087.57 : x
  2. Step 2: Convert to fraction form
    245,519.79/338,793.39 = 138,087.57/x
  3. Step 3: Cross multiply
    245,519.79x = 338,793.39 × 138,087.57
  4. Step 4: Simplify right side
    245,519.79x = 46,783,155,957.16
  5. Step 5: Solve for x
    x = 46,783,155,957.16/245,519.79
  6. Step 6: Final answer
    x = 190,547.39

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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.