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Finding the Fourth Proportional to 100,261.50, 138,360.90 and 59,976.96

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Solution

The fourth proportional to 100,261.50, 138,360.90 and 59,976.96 is: 82,768.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,261.50 : 138,360.90 = 59,976.96 : x
  2. Step 2: Convert to fraction form
    100,261.50/138,360.90 = 59,976.96/x
  3. Step 3: Cross multiply
    100,261.50x = 138,360.90 × 59,976.96
  4. Step 4: Simplify right side
    100,261.50x = 8,298,466,164.86
  5. Step 5: Solve for x
    x = 8,298,466,164.86/100,261.50
  6. Step 6: Final answer
    x = 82,768.22

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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.