Home / 129,429.99-178,578.48-75,728.19

Finding the Fourth Proportional to 129,429.99, 178,578.48 and 75,728.19

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Solution

The fourth proportional to 129,429.99, 178,578.48 and 75,728.19 is: 104,484.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,429.99 : 178,578.48 = 75,728.19 : x
  2. Step 2: Convert to fraction form
    129,429.99/178,578.48 = 75,728.19/x
  3. Step 3: Cross multiply
    129,429.99x = 178,578.48 × 75,728.19
  4. Step 4: Simplify right side
    129,429.99x = 13,523,425,063.35
  5. Step 5: Solve for x
    x = 13,523,425,063.35/129,429.99
  6. Step 6: Final answer
    x = 104,484.48

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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.