Home / 129,050.88-178,012.99-81,221.19

Finding the Fourth Proportional to 129,050.88, 178,012.99 and 81,221.19

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Solution

The fourth proportional to 129,050.88, 178,012.99 and 81,221.19 is: 112,036.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,050.88 : 178,012.99 = 81,221.19 : x
  2. Step 2: Convert to fraction form
    129,050.88/178,012.99 = 81,221.19/x
  3. Step 3: Cross multiply
    129,050.88x = 178,012.99 × 81,221.19
  4. Step 4: Simplify right side
    129,050.88x = 14,458,426,883.26
  5. Step 5: Solve for x
    x = 14,458,426,883.26/129,050.88
  6. Step 6: Final answer
    x = 112,036.64

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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.