Home / 81,951.12-122,985-63,249.84

Finding the Fourth Proportional to 81,951.12, 122,985 and 63,249.84

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Solution

The fourth proportional to 81,951.12, 122,985 and 63,249.84 is: 94,919.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,951.12 : 122,985 = 63,249.84 : x
  2. Step 2: Convert to fraction form
    81,951.12/122,985 = 63,249.84/x
  3. Step 3: Cross multiply
    81,951.12x = 122,985 × 63,249.84
  4. Step 4: Simplify right side
    81,951.12x = 7,778,781,572.40
  5. Step 5: Solve for x
    x = 7,778,781,572.40/81,951.12
  6. Step 6: Final answer
    x = 94,919.77

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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.