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Finding the Fourth Proportional to 136,997.88, 205,495.86 and 70,456.56

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Solution

The fourth proportional to 136,997.88, 205,495.86 and 70,456.56 is: 105,684.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,997.88 : 205,495.86 = 70,456.56 : x
  2. Step 2: Convert to fraction form
    136,997.88/205,495.86 = 70,456.56/x
  3. Step 3: Cross multiply
    136,997.88x = 205,495.86 × 70,456.56
  4. Step 4: Simplify right side
    136,997.88x = 14,478,531,389.84
  5. Step 5: Solve for x
    x = 14,478,531,389.84/136,997.88
  6. Step 6: Final answer
    x = 105,684.35

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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.