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Finding the Fourth Proportional to 129,637.79, 178,893.74 and 73,052.81

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Solution

The fourth proportional to 129,637.79, 178,893.74 and 73,052.81 is: 100,809.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,637.79 : 178,893.74 = 73,052.81 : x
  2. Step 2: Convert to fraction form
    129,637.79/178,893.74 = 73,052.81/x
  3. Step 3: Cross multiply
    129,637.79x = 178,893.74 × 73,052.81
  4. Step 4: Simplify right side
    129,637.79x = 13,068,690,033.15
  5. Step 5: Solve for x
    x = 13,068,690,033.15/129,637.79
  6. Step 6: Final answer
    x = 100,809.26

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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.