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Finding the Fourth Proportional to 131,047.76, 180,860.96 and 72,910.28

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Solution

The fourth proportional to 131,047.76, 180,860.96 and 72,910.28 is: 100,624.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,047.76 : 180,860.96 = 72,910.28 : x
  2. Step 2: Convert to fraction form
    131,047.76/180,860.96 = 72,910.28/x
  3. Step 3: Cross multiply
    131,047.76x = 180,860.96 × 72,910.28
  4. Step 4: Simplify right side
    131,047.76x = 13,186,623,234.67
  5. Step 5: Solve for x
    x = 13,186,623,234.67/131,047.76
  6. Step 6: Final answer
    x = 100,624.56

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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.