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Finding the Fourth Proportional to 129,650.77, 178,918.10 and 73,064.17

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Solution

The fourth proportional to 129,650.77, 178,918.10 and 73,064.17 is: 100,828.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,650.77 : 178,918.10 = 73,064.17 : x
  2. Step 2: Convert to fraction form
    129,650.77/178,918.10 = 73,064.17/x
  3. Step 3: Cross multiply
    129,650.77x = 178,918.10 × 73,064.17
  4. Step 4: Simplify right side
    129,650.77x = 13,072,502,474.48
  5. Step 5: Solve for x
    x = 13,072,502,474.48/129,650.77
  6. Step 6: Final answer
    x = 100,828.58

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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.