Home / 129,446.78-178,617.96-75,721.64

Finding the Fourth Proportional to 129,446.78, 178,617.96 and 75,721.64

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Solution

The fourth proportional to 129,446.78, 178,617.96 and 75,721.64 is: 104,484.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,446.78 : 178,617.96 = 75,721.64 : x
  2. Step 2: Convert to fraction form
    129,446.78/178,617.96 = 75,721.64/x
  3. Step 3: Cross multiply
    129,446.78x = 178,617.96 × 75,721.64
  4. Step 4: Simplify right side
    129,446.78x = 13,525,243,971.56
  5. Step 5: Solve for x
    x = 13,525,243,971.56/129,446.78
  6. Step 6: Final answer
    x = 104,484.98

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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.