Home / 129,145.58-178,212.26-71,781.18

Finding the Fourth Proportional to 129,145.58, 178,212.26 and 71,781.18

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Solution

The fourth proportional to 129,145.58, 178,212.26 and 71,781.18 is: 99,053.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,145.58 : 178,212.26 = 71,781.18 : x
  2. Step 2: Convert to fraction form
    129,145.58/178,212.26 = 71,781.18/x
  3. Step 3: Cross multiply
    129,145.58x = 178,212.26 × 71,781.18
  4. Step 4: Simplify right side
    129,145.58x = 12,792,286,313.27
  5. Step 5: Solve for x
    x = 12,792,286,313.27/129,145.58
  6. Step 6: Final answer
    x = 99,053.23

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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.