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Finding the Fourth Proportional to 245,565.90, 338,877.54 and 138,135.90

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Solution

The fourth proportional to 245,565.90, 338,877.54 and 138,135.90 is: 190,625.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,565.90 : 338,877.54 = 138,135.90 : x
  2. Step 2: Convert to fraction form
    245,565.90/338,877.54 = 138,135.90/x
  3. Step 3: Cross multiply
    245,565.90x = 338,877.54 × 138,135.90
  4. Step 4: Simplify right side
    245,565.90x = 46,811,153,977.69
  5. Step 5: Solve for x
    x = 46,811,153,977.69/245,565.90
  6. Step 6: Final answer
    x = 190,625.63

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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.