Home / 129,506.12-178,719.06-72,918.44

Finding the Fourth Proportional to 129,506.12, 178,719.06 and 72,918.44

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Solution

The fourth proportional to 129,506.12, 178,719.06 and 72,918.44 is: 100,627.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,506.12 : 178,719.06 = 72,918.44 : x
  2. Step 2: Convert to fraction form
    129,506.12/178,719.06 = 72,918.44/x
  3. Step 3: Cross multiply
    129,506.12x = 178,719.06 × 72,918.44
  4. Step 4: Simplify right side
    129,506.12x = 13,031,915,053.47
  5. Step 5: Solve for x
    x = 13,031,915,053.47/129,506.12
  6. Step 6: Final answer
    x = 100,627.79

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1.5x scale

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.