Home / 129,011.31-178,029.60-71,654.29

Finding the Fourth Proportional to 129,011.31, 178,029.60 and 71,654.29

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Solution

The fourth proportional to 129,011.31, 178,029.60 and 71,654.29 is: 98,879.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,011.31 : 178,029.60 = 71,654.29 : x
  2. Step 2: Convert to fraction form
    129,011.31/178,029.60 = 71,654.29/x
  3. Step 3: Cross multiply
    129,011.31x = 178,029.60 × 71,654.29
  4. Step 4: Simplify right side
    129,011.31x = 12,756,584,586.98
  5. Step 5: Solve for x
    x = 12,756,584,586.98/129,011.31
  6. Step 6: Final answer
    x = 98,879.58

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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.