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Finding the Fourth Proportional to 136,878.56, 205,446.96 and 70,365.32

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Solution

The fourth proportional to 136,878.56, 205,446.96 and 70,365.32 is: 105,614.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,878.56 : 205,446.96 = 70,365.32 : x
  2. Step 2: Convert to fraction form
    136,878.56/205,446.96 = 70,365.32/x
  3. Step 3: Cross multiply
    136,878.56x = 205,446.96 × 70,365.32
  4. Step 4: Simplify right side
    136,878.56x = 14,456,341,083.43
  5. Step 5: Solve for x
    x = 14,456,341,083.43/136,878.56
  6. Step 6: Final answer
    x = 105,614.36

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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.