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Finding the Fourth Proportional to 78,157.71, 117,252.97 and 25,563.09

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Solution

The fourth proportional to 78,157.71, 117,252.97 and 25,563.09 is: 38,350.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,157.71 : 117,252.97 = 25,563.09 : x
  2. Step 2: Convert to fraction form
    78,157.71/117,252.97 = 25,563.09/x
  3. Step 3: Cross multiply
    78,157.71x = 117,252.97 × 25,563.09
  4. Step 4: Simplify right side
    78,157.71x = 2,997,348,600.67
  5. Step 5: Solve for x
    x = 2,997,348,600.67/78,157.71
  6. Step 6: Final answer
    x = 38,350.01

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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.