Home / 129,189.06-178,280.19-72,600.44

Finding the Fourth Proportional to 129,189.06, 178,280.19 and 72,600.44

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Solution

The fourth proportional to 129,189.06, 178,280.19 and 72,600.44 is: 100,188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,189.06 : 178,280.19 = 72,600.44 : x
  2. Step 2: Convert to fraction form
    129,189.06/178,280.19 = 72,600.44/x
  3. Step 3: Cross multiply
    129,189.06x = 178,280.19 × 72,600.44
  4. Step 4: Simplify right side
    129,189.06x = 12,943,219,345.88
  5. Step 5: Solve for x
    x = 12,943,219,345.88/129,189.06
  6. Step 6: Final answer
    x = 100,188.20

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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.