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Finding the Fourth Proportional to 129,885.98, 179,245.69 and 72,523.35

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Solution

The fourth proportional to 129,885.98, 179,245.69 and 72,523.35 is: 100,083.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,885.98 : 179,245.69 = 72,523.35 : x
  2. Step 2: Convert to fraction form
    129,885.98/179,245.69 = 72,523.35/x
  3. Step 3: Cross multiply
    129,885.98x = 179,245.69 × 72,523.35
  4. Step 4: Simplify right side
    129,885.98x = 12,999,497,730.55
  5. Step 5: Solve for x
    x = 12,999,497,730.55/129,885.98
  6. Step 6: Final answer
    x = 100,083.92

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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.