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Finding the Fourth Proportional to 100,991.82, 139,310.91 and 63,200.46

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Solution

The fourth proportional to 100,991.82, 139,310.91 and 63,200.46 is: 87,180.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,991.82 : 139,310.91 = 63,200.46 : x
  2. Step 2: Convert to fraction form
    100,991.82/139,310.91 = 63,200.46/x
  3. Step 3: Cross multiply
    100,991.82x = 139,310.91 × 63,200.46
  4. Step 4: Simplify right side
    100,991.82x = 8,804,513,595.02
  5. Step 5: Solve for x
    x = 8,804,513,595.02/100,991.82
  6. Step 6: Final answer
    x = 87,180.46

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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.