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Finding the Fourth Proportional to 57,781.60, 81,069.20 and 57,781.60

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Solution

The fourth proportional to 57,781.60, 81,069.20 and 57,781.60 is: 81,069.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,781.60 : 81,069.20 = 57,781.60 : x
  2. Step 2: Convert to fraction form
    57,781.60/81,069.20 = 57,781.60/x
  3. Step 3: Cross multiply
    57,781.60x = 81,069.20 × 57,781.60
  4. Step 4: Simplify right side
    57,781.60x = 4,684,308,086.72
  5. Step 5: Solve for x
    x = 4,684,308,086.72/57,781.60
  6. Step 6: Final answer
    x = 81,069.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.