Home / 129,212.64-178,297.95-71,837.56

Finding the Fourth Proportional to 129,212.64, 178,297.95 and 71,837.56

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Solution

The fourth proportional to 129,212.64, 178,297.95 and 71,837.56 is: 99,127.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,212.64 : 178,297.95 = 71,837.56 : x
  2. Step 2: Convert to fraction form
    129,212.64/178,297.95 = 71,837.56/x
  3. Step 3: Cross multiply
    129,212.64x = 178,297.95 × 71,837.56
  4. Step 4: Simplify right side
    129,212.64x = 12,808,489,166.69
  5. Step 5: Solve for x
    x = 12,808,489,166.69/129,212.64
  6. Step 6: Final answer
    x = 99,127.21

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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.