Home / 130,939.85-180,692.43-80,038.10

Finding the Fourth Proportional to 130,939.85, 180,692.43 and 80,038.10

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Solution

The fourth proportional to 130,939.85, 180,692.43 and 80,038.10 is: 110,449.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,939.85 : 180,692.43 = 80,038.10 : x
  2. Step 2: Convert to fraction form
    130,939.85/180,692.43 = 80,038.10/x
  3. Step 3: Cross multiply
    130,939.85x = 180,692.43 × 80,038.10
  4. Step 4: Simplify right side
    130,939.85x = 14,462,278,781.58
  5. Step 5: Solve for x
    x = 14,462,278,781.58/130,939.85
  6. Step 6: Final answer
    x = 110,449.79

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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.