Home / 129,011.33-178,029.73-71,654.32

Finding the Fourth Proportional to 129,011.33, 178,029.73 and 71,654.32

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Solution

The fourth proportional to 129,011.33, 178,029.73 and 71,654.32 is: 98,879.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,011.33 : 178,029.73 = 71,654.32 : x
  2. Step 2: Convert to fraction form
    129,011.33/178,029.73 = 71,654.32/x
  3. Step 3: Cross multiply
    129,011.33x = 178,029.73 × 71,654.32
  4. Step 4: Simplify right side
    129,011.33x = 12,756,599,242.93
  5. Step 5: Solve for x
    x = 12,756,599,242.93/129,011.33
  6. Step 6: Final answer
    x = 98,879.68

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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.