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Finding the Fourth Proportional to 245,519.72, 338,813.87 and 138,089.71

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Solution

The fourth proportional to 245,519.72, 338,813.87 and 138,089.71 is: 190,561.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,519.72 : 338,813.87 = 138,089.71 : x
  2. Step 2: Convert to fraction form
    245,519.72/338,813.87 = 138,089.71/x
  3. Step 3: Cross multiply
    245,519.72x = 338,813.87 × 138,089.71
  4. Step 4: Simplify right side
    245,519.72x = 46,786,709,052.28
  5. Step 5: Solve for x
    x = 46,786,709,052.28/245,519.72
  6. Step 6: Final answer
    x = 190,561.92

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1.5x scale

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.