Home / 120,869.80-180,946.30-89,842.60

Finding the Fourth Proportional to 120,869.80, 180,946.30 and 89,842.60

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Solution

The fourth proportional to 120,869.80, 180,946.30 and 89,842.60 is: 134,497.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,869.80 : 180,946.30 = 89,842.60 : x
  2. Step 2: Convert to fraction form
    120,869.80/180,946.30 = 89,842.60/x
  3. Step 3: Cross multiply
    120,869.80x = 180,946.30 × 89,842.60
  4. Step 4: Simplify right side
    120,869.80x = 16,256,686,052.38
  5. Step 5: Solve for x
    x = 16,256,686,052.38/120,869.80
  6. Step 6: Final answer
    x = 134,497.50

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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.