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Finding the Fourth Proportional to 129,683.51, 178,964.61 and 73,094.89

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Solution

The fourth proportional to 129,683.51, 178,964.61 and 73,094.89 is: 100,871.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,683.51 : 178,964.61 = 73,094.89 : x
  2. Step 2: Convert to fraction form
    129,683.51/178,964.61 = 73,094.89/x
  3. Step 3: Cross multiply
    129,683.51x = 178,964.61 × 73,094.89
  4. Step 4: Simplify right side
    129,683.51x = 13,081,398,481.84
  5. Step 5: Solve for x
    x = 13,081,398,481.84/129,683.51
  6. Step 6: Final answer
    x = 100,871.72

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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.