Home / 429,054.13-643,676.88-140,878.61

Finding the Fourth Proportional to 429,054.13, 643,676.88 and 140,878.61

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Solution

The fourth proportional to 429,054.13, 643,676.88 and 140,878.61 is: 211,349.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,054.13 : 643,676.88 = 140,878.61 : x
  2. Step 2: Convert to fraction form
    429,054.13/643,676.88 = 140,878.61/x
  3. Step 3: Cross multiply
    429,054.13x = 643,676.88 × 140,878.61
  4. Step 4: Simplify right side
    429,054.13x = 90,680,304,143.54
  5. Step 5: Solve for x
    x = 90,680,304,143.54/429,054.13
  6. Step 6: Final answer
    x = 211,349.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.