Home / 129,453.47-178,644.35-72,091.54

Finding the Fourth Proportional to 129,453.47, 178,644.35 and 72,091.54

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Solution

The fourth proportional to 129,453.47, 178,644.35 and 72,091.54 is: 99,485.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,453.47 : 178,644.35 = 72,091.54 : x
  2. Step 2: Convert to fraction form
    129,453.47/178,644.35 = 72,091.54/x
  3. Step 3: Cross multiply
    129,453.47x = 178,644.35 × 72,091.54
  4. Step 4: Simplify right side
    129,453.47x = 12,878,745,496.73
  5. Step 5: Solve for x
    x = 12,878,745,496.73/129,453.47
  6. Step 6: Final answer
    x = 99,485.52

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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.