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Finding the Fourth Proportional to 71,473.60, 98,632.02 and 39,641.80

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Solution

The fourth proportional to 71,473.60, 98,632.02 and 39,641.80 is: 54,704.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,473.60 : 98,632.02 = 39,641.80 : x
  2. Step 2: Convert to fraction form
    71,473.60/98,632.02 = 39,641.80/x
  3. Step 3: Cross multiply
    71,473.60x = 98,632.02 × 39,641.80
  4. Step 4: Simplify right side
    71,473.60x = 3,909,950,810.44
  5. Step 5: Solve for x
    x = 3,909,950,810.44/71,473.60
  6. Step 6: Final answer
    x = 54,704.83

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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.