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Finding the Fourth Proportional to 129,638.04, 178,894.08 and 73,053.06

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Solution

The fourth proportional to 129,638.04, 178,894.08 and 73,053.06 is: 100,809.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,638.04 : 178,894.08 = 73,053.06 : x
  2. Step 2: Convert to fraction form
    129,638.04/178,894.08 = 73,053.06/x
  3. Step 3: Cross multiply
    129,638.04x = 178,894.08 × 73,053.06
  4. Step 4: Simplify right side
    129,638.04x = 13,068,759,959.88
  5. Step 5: Solve for x
    x = 13,068,759,959.88/129,638.04
  6. Step 6: Final answer
    x = 100,809.61

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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.