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Finding the Fourth Proportional to 129,671.66, 178,946.34 and 73,082.36

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Solution

The fourth proportional to 129,671.66, 178,946.34 and 73,082.36 is: 100,853.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,671.66 : 178,946.34 = 73,082.36 : x
  2. Step 2: Convert to fraction form
    129,671.66/178,946.34 = 73,082.36/x
  3. Step 3: Cross multiply
    129,671.66x = 178,946.34 × 73,082.36
  4. Step 4: Simplify right side
    129,671.66x = 13,077,820,840.56
  5. Step 5: Solve for x
    x = 13,077,820,840.56/129,671.66
  6. Step 6: Final answer
    x = 100,853.35

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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.