Home / 120,141.35-180,286.13-61,019.45

Finding the Fourth Proportional to 120,141.35, 180,286.13 and 61,019.45

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Solution

The fourth proportional to 120,141.35, 180,286.13 and 61,019.45 is: 91,566.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,141.35 : 180,286.13 = 61,019.45 : x
  2. Step 2: Convert to fraction form
    120,141.35/180,286.13 = 61,019.45/x
  3. Step 3: Cross multiply
    120,141.35x = 180,286.13 × 61,019.45
  4. Step 4: Simplify right side
    120,141.35x = 11,000,960,495.23
  5. Step 5: Solve for x
    x = 11,000,960,495.23/120,141.35
  6. Step 6: Final answer
    x = 91,566.81

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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.