Home / 80,511.10-120,755.70-30,603.76

Finding the Fourth Proportional to 80,511.10, 120,755.70 and 30,603.76

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Solution

The fourth proportional to 80,511.10, 120,755.70 and 30,603.76 is: 45,901.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,511.10 : 120,755.70 = 30,603.76 : x
  2. Step 2: Convert to fraction form
    80,511.10/120,755.70 = 30,603.76/x
  3. Step 3: Cross multiply
    80,511.10x = 120,755.70 × 30,603.76
  4. Step 4: Simplify right side
    80,511.10x = 3,695,578,461.43
  5. Step 5: Solve for x
    x = 3,695,578,461.43/80,511.10
  6. Step 6: Final answer
    x = 45,901.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.