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Finding the Fourth Proportional to 122,457.90, 183,492.45 and 80,856.30

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Solution

The fourth proportional to 122,457.90, 183,492.45 and 80,856.30 is: 121,156.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,457.90 : 183,492.45 = 80,856.30 : x
  2. Step 2: Convert to fraction form
    122,457.90/183,492.45 = 80,856.30/x
  3. Step 3: Cross multiply
    122,457.90x = 183,492.45 × 80,856.30
  4. Step 4: Simplify right side
    122,457.90x = 14,836,520,584.94
  5. Step 5: Solve for x
    x = 14,836,520,584.94/122,457.90
  6. Step 6: Final answer
    x = 121,156.09

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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.