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Finding the Fourth Proportional to 245,646.01, 338,998.12 and 138,219.86

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Solution

The fourth proportional to 245,646.01, 338,998.12 and 138,219.86 is: 190,747.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,646.01 : 338,998.12 = 138,219.86 : x
  2. Step 2: Convert to fraction form
    245,646.01/338,998.12 = 138,219.86/x
  3. Step 3: Cross multiply
    245,646.01x = 338,998.12 × 138,219.86
  4. Step 4: Simplify right side
    245,646.01x = 46,856,272,686.66
  5. Step 5: Solve for x
    x = 46,856,272,686.66/245,646.01
  6. Step 6: Final answer
    x = 190,747.14

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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.