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Finding the Fourth Proportional to 145,645.30, 200,645.92 and 138,918.90

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Solution

The fourth proportional to 145,645.30, 200,645.92 and 138,918.90 is: 191,379.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,645.30 : 200,645.92 = 138,918.90 : x
  2. Step 2: Convert to fraction form
    145,645.30/200,645.92 = 138,918.90/x
  3. Step 3: Cross multiply
    145,645.30x = 200,645.92 × 138,918.90
  4. Step 4: Simplify right side
    145,645.30x = 27,873,511,421.96
  5. Step 5: Solve for x
    x = 27,873,511,421.96/145,645.30
  6. Step 6: Final answer
    x = 191,379.41

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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.