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Finding the Fourth Proportional to 71,335.80, 107,003.70 and 66,670.20

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Solution

The fourth proportional to 71,335.80, 107,003.70 and 66,670.20 is: 100,005.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,335.80 : 107,003.70 = 66,670.20 : x
  2. Step 2: Convert to fraction form
    71,335.80/107,003.70 = 66,670.20/x
  3. Step 3: Cross multiply
    71,335.80x = 107,003.70 × 66,670.20
  4. Step 4: Simplify right side
    71,335.80x = 7,133,958,079.74
  5. Step 5: Solve for x
    x = 7,133,958,079.74/71,335.80
  6. Step 6: Final answer
    x = 100,005.30

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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.