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Finding the Fourth Proportional to 71,426.70, 107,387.10 and 66,801.60

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Solution

The fourth proportional to 71,426.70, 107,387.10 and 66,801.60 is: 100,433.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,426.70 : 107,387.10 = 66,801.60 : x
  2. Step 2: Convert to fraction form
    71,426.70/107,387.10 = 66,801.60/x
  3. Step 3: Cross multiply
    71,426.70x = 107,387.10 × 66,801.60
  4. Step 4: Simplify right side
    71,426.70x = 7,173,630,099.36
  5. Step 5: Solve for x
    x = 7,173,630,099.36/71,426.70
  6. Step 6: Final answer
    x = 100,433.45

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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.