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Finding the Fourth Proportional to 120,865.60, 181,492.80 and 87,817.60

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Solution

The fourth proportional to 120,865.60, 181,492.80 and 87,817.60 is: 131,867.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,865.60 : 181,492.80 = 87,817.60 : x
  2. Step 2: Convert to fraction form
    120,865.60/181,492.80 = 87,817.60/x
  3. Step 3: Cross multiply
    120,865.60x = 181,492.80 × 87,817.60
  4. Step 4: Simplify right side
    120,865.60x = 15,938,262,113.28
  5. Step 5: Solve for x
    x = 15,938,262,113.28/120,865.60
  6. Step 6: Final answer
    x = 131,867.65

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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.