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Finding the Fourth Proportional to 345,492.50, 518,213.78 and 108,902.90

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Solution

The fourth proportional to 345,492.50, 518,213.78 and 108,902.90 is: 163,346.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,492.50 : 518,213.78 = 108,902.90 : x
  2. Step 2: Convert to fraction form
    345,492.50/518,213.78 = 108,902.90/x
  3. Step 3: Cross multiply
    345,492.50x = 518,213.78 × 108,902.90
  4. Step 4: Simplify right side
    345,492.50x = 56,434,983,461.96
  5. Step 5: Solve for x
    x = 56,434,983,461.96/345,492.50
  6. Step 6: Final answer
    x = 163,346.48

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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.