Home / 81,529.21-112,511.47-49,259.35

Finding the Fourth Proportional to 81,529.21, 112,511.47 and 49,259.35

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Solution

The fourth proportional to 81,529.21, 112,511.47 and 49,259.35 is: 67,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,529.21 : 112,511.47 = 49,259.35 : x
  2. Step 2: Convert to fraction form
    81,529.21/112,511.47 = 49,259.35/x
  3. Step 3: Cross multiply
    81,529.21x = 112,511.47 × 49,259.35
  4. Step 4: Simplify right side
    81,529.21x = 5,542,241,879.74
  5. Step 5: Solve for x
    x = 5,542,241,879.74/81,529.21
  6. Step 6: Final answer
    x = 67,978.60

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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.