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Finding the Fourth Proportional to 136,881.54, 188,985.42 and 122,516.46

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Solution

The fourth proportional to 136,881.54, 188,985.42 and 122,516.46 is: 169,152.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,881.54 : 188,985.42 = 122,516.46 : x
  2. Step 2: Convert to fraction form
    136,881.54/188,985.42 = 122,516.46/x
  3. Step 3: Cross multiply
    136,881.54x = 188,985.42 × 122,516.46
  4. Step 4: Simplify right side
    136,881.54x = 23,153,824,650.01
  5. Step 5: Solve for x
    x = 23,153,824,650.01/136,881.54
  6. Step 6: Final answer
    x = 169,152.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.