Home / 129,042.09-178,061.58-75,314.79

Finding the Fourth Proportional to 129,042.09, 178,061.58 and 75,314.79

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Solution

The fourth proportional to 129,042.09, 178,061.58 and 75,314.79 is: 103,924.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,042.09 : 178,061.58 = 75,314.79 : x
  2. Step 2: Convert to fraction form
    129,042.09/178,061.58 = 75,314.79/x
  3. Step 3: Cross multiply
    129,042.09x = 178,061.58 × 75,314.79
  4. Step 4: Simplify right side
    129,042.09x = 13,410,670,504.77
  5. Step 5: Solve for x
    x = 13,410,670,504.77/129,042.09
  6. Step 6: Final answer
    x = 103,924.78

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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.