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Finding the Fourth Proportional to 51,781.60, 77,672.40 and 20,600.80

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Solution

The fourth proportional to 51,781.60, 77,672.40 and 20,600.80 is: 30,901.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,781.60 : 77,672.40 = 20,600.80 : x
  2. Step 2: Convert to fraction form
    51,781.60/77,672.40 = 20,600.80/x
  3. Step 3: Cross multiply
    51,781.60x = 77,672.40 × 20,600.80
  4. Step 4: Simplify right side
    51,781.60x = 1,600,113,577.92
  5. Step 5: Solve for x
    x = 1,600,113,577.92/51,781.60
  6. Step 6: Final answer
    x = 30,901.20

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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.