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Finding the Fourth Proportional to 86,906.80, 130,327.80 and 34,305.40

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Solution

The fourth proportional to 86,906.80, 130,327.80 and 34,305.40 is: 51,445.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,906.80 : 130,327.80 = 34,305.40 : x
  2. Step 2: Convert to fraction form
    86,906.80/130,327.80 = 34,305.40/x
  3. Step 3: Cross multiply
    86,906.80x = 130,327.80 × 34,305.40
  4. Step 4: Simplify right side
    86,906.80x = 4,470,947,310.12
  5. Step 5: Solve for x
    x = 4,470,947,310.12/86,906.80
  6. Step 6: Final answer
    x = 51,445.31

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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.