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Finding the Fourth Proportional to 245,578.74, 338,898.17 and 138,148.85

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Solution

The fourth proportional to 245,578.74, 338,898.17 and 138,148.85 is: 190,645.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,578.74 : 338,898.17 = 138,148.85 : x
  2. Step 2: Convert to fraction form
    245,578.74/338,898.17 = 138,148.85/x
  3. Step 3: Cross multiply
    245,578.74x = 338,898.17 × 138,148.85
  4. Step 4: Simplify right side
    245,578.74x = 46,818,392,303.53
  5. Step 5: Solve for x
    x = 46,818,392,303.53/245,578.74
  6. Step 6: Final answer
    x = 190,645.14

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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.