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Finding the Fourth Proportional to 129,393.01, 178,560.52 and 72,804.25

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Solution

The fourth proportional to 129,393.01, 178,560.52 and 72,804.25 is: 100,468.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,393.01 : 178,560.52 = 72,804.25 : x
  2. Step 2: Convert to fraction form
    129,393.01/178,560.52 = 72,804.25/x
  3. Step 3: Cross multiply
    129,393.01x = 178,560.52 × 72,804.25
  4. Step 4: Simplify right side
    129,393.01x = 12,999,964,738.21
  5. Step 5: Solve for x
    x = 12,999,964,738.21/129,393.01
  6. Step 6: Final answer
    x = 100,468.83

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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.