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Finding the Fourth Proportional to 71,373.80, 107,060.70 and 66,999.80

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Solution

The fourth proportional to 71,373.80, 107,060.70 and 66,999.80 is: 100,499.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,373.80 : 107,060.70 = 66,999.80 : x
  2. Step 2: Convert to fraction form
    71,373.80/107,060.70 = 66,999.80/x
  3. Step 3: Cross multiply
    71,373.80x = 107,060.70 × 66,999.80
  4. Step 4: Simplify right side
    71,373.80x = 7,173,045,487.86
  5. Step 5: Solve for x
    x = 7,173,045,487.86/71,373.80
  6. Step 6: Final answer
    x = 100,499.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.