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Finding the Fourth Proportional to 72,865.90, 100,555.31 and 41,035.34

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Solution

The fourth proportional to 72,865.90, 100,555.31 and 41,035.34 is: 56,628.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,865.90 : 100,555.31 = 41,035.34 : x
  2. Step 2: Convert to fraction form
    72,865.90/100,555.31 = 41,035.34/x
  3. Step 3: Cross multiply
    72,865.90x = 100,555.31 × 41,035.34
  4. Step 4: Simplify right side
    72,865.90x = 4,126,321,334.66
  5. Step 5: Solve for x
    x = 4,126,321,334.66/72,865.90
  6. Step 6: Final answer
    x = 56,628.98

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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.