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Finding the Fourth Proportional to 129,588.77, 178,831.72 and 73,018.37

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Solution

The fourth proportional to 129,588.77, 178,831.72 and 73,018.37 is: 100,764.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,588.77 : 178,831.72 = 73,018.37 : x
  2. Step 2: Convert to fraction form
    129,588.77/178,831.72 = 73,018.37/x
  3. Step 3: Cross multiply
    129,588.77x = 178,831.72 × 73,018.37
  4. Step 4: Simplify right side
    129,588.77x = 13,058,000,698.70
  5. Step 5: Solve for x
    x = 13,058,000,698.70/129,588.77
  6. Step 6: Final answer
    x = 100,764.91

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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.