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Finding the Fourth Proportional to 345,353.32, 518,100.05 and 108,640.95

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Solution

The fourth proportional to 345,353.32, 518,100.05 and 108,640.95 is: 162,983.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,353.32 : 518,100.05 = 108,640.95 : x
  2. Step 2: Convert to fraction form
    345,353.32/518,100.05 = 108,640.95/x
  3. Step 3: Cross multiply
    345,353.32x = 518,100.05 × 108,640.95
  4. Step 4: Simplify right side
    345,353.32x = 56,286,881,412.93
  5. Step 5: Solve for x
    x = 56,286,881,412.93/345,353.32
  6. Step 6: Final answer
    x = 162,983.47

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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.