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Finding the Fourth Proportional to 120,107.70, 180,161.55 and 61,058.70

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Solution

The fourth proportional to 120,107.70, 180,161.55 and 61,058.70 is: 91,588.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,107.70 : 180,161.55 = 61,058.70 : x
  2. Step 2: Convert to fraction form
    120,107.70/180,161.55 = 61,058.70/x
  3. Step 3: Cross multiply
    120,107.70x = 180,161.55 × 61,058.70
  4. Step 4: Simplify right side
    120,107.70x = 11,000,430,032.99
  5. Step 5: Solve for x
    x = 11,000,430,032.99/120,107.70
  6. Step 6: Final answer
    x = 91,588.05

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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.