Home / 129,322.78-178,467.06-72,734.16

Finding the Fourth Proportional to 129,322.78, 178,467.06 and 72,734.16

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Solution

The fourth proportional to 129,322.78, 178,467.06 and 72,734.16 is: 100,374.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,322.78 : 178,467.06 = 72,734.16 : x
  2. Step 2: Convert to fraction form
    129,322.78/178,467.06 = 72,734.16/x
  3. Step 3: Cross multiply
    129,322.78x = 178,467.06 × 72,734.16
  4. Step 4: Simplify right side
    129,322.78x = 12,980,651,696.77
  5. Step 5: Solve for x
    x = 12,980,651,696.77/129,322.78
  6. Step 6: Final answer
    x = 100,374.05

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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.