Home / 129,504.66-178,719.93-72,918.06

Finding the Fourth Proportional to 129,504.66, 178,719.93 and 72,918.06

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Solution

The fourth proportional to 129,504.66, 178,719.93 and 72,918.06 is: 100,628.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,504.66 : 178,719.93 = 72,918.06 : x
  2. Step 2: Convert to fraction form
    129,504.66/178,719.93 = 72,918.06/x
  3. Step 3: Cross multiply
    129,504.66x = 178,719.93 × 72,918.06
  4. Step 4: Simplify right side
    129,504.66x = 13,031,910,578.94
  5. Step 5: Solve for x
    x = 13,031,910,578.94/129,504.66
  6. Step 6: Final answer
    x = 100,628.89

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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.