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Finding the Fourth Proportional to 215,577.90, 297,491.67 and 120,078.90

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Solution

The fourth proportional to 215,577.90, 297,491.67 and 120,078.90 is: 165,705.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,577.90 : 297,491.67 = 120,078.90 : x
  2. Step 2: Convert to fraction form
    215,577.90/297,491.67 = 120,078.90/x
  3. Step 3: Cross multiply
    215,577.90x = 297,491.67 × 120,078.90
  4. Step 4: Simplify right side
    215,577.90x = 35,722,472,492.76
  5. Step 5: Solve for x
    x = 35,722,472,492.76/215,577.90
  6. Step 6: Final answer
    x = 165,705.63

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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.