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Finding the Fourth Proportional to 345,354.32, 518,101.55 and 108,641.95

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Solution

The fourth proportional to 345,354.32, 518,101.55 and 108,641.95 is: 162,984.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,354.32 : 518,101.55 = 108,641.95 : x
  2. Step 2: Convert to fraction form
    345,354.32/518,101.55 = 108,641.95/x
  3. Step 3: Cross multiply
    345,354.32x = 518,101.55 × 108,641.95
  4. Step 4: Simplify right side
    345,354.32x = 56,287,562,690.02
  5. Step 5: Solve for x
    x = 56,287,562,690.02/345,354.32
  6. Step 6: Final answer
    x = 162,984.97

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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.