Home / 129,699.32-178,987.80-73,110.68

Finding the Fourth Proportional to 129,699.32, 178,987.80 and 73,110.68

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Solution

The fourth proportional to 129,699.32, 178,987.80 and 73,110.68 is: 100,894.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,699.32 : 178,987.80 = 73,110.68 : x
  2. Step 2: Convert to fraction form
    129,699.32/178,987.80 = 73,110.68/x
  3. Step 3: Cross multiply
    129,699.32x = 178,987.80 × 73,110.68
  4. Step 4: Simplify right side
    129,699.32x = 13,085,919,769.70
  5. Step 5: Solve for x
    x = 13,085,919,769.70/129,699.32
  6. Step 6: Final answer
    x = 100,894.28

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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.