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Finding the Fourth Proportional to 129,812.34, 194,746.66 and 39,855.36

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Solution

The fourth proportional to 129,812.34, 194,746.66 and 39,855.36 is: 59,791.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,812.34 : 194,746.66 = 39,855.36 : x
  2. Step 2: Convert to fraction form
    129,812.34/194,746.66 = 39,855.36/x
  3. Step 3: Cross multiply
    129,812.34x = 194,746.66 × 39,855.36
  4. Step 4: Simplify right side
    129,812.34x = 7,761,698,002.50
  5. Step 5: Solve for x
    x = 7,761,698,002.50/129,812.34
  6. Step 6: Final answer
    x = 59,791.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.