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Finding the Fourth Proportional to 53,716.80, 80,602.80 and 40,649.28

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Solution

The fourth proportional to 53,716.80, 80,602.80 and 40,649.28 is: 60,994.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,716.80 : 80,602.80 = 40,649.28 : x
  2. Step 2: Convert to fraction form
    53,716.80/80,602.80 = 40,649.28/x
  3. Step 3: Cross multiply
    53,716.80x = 80,602.80 × 40,649.28
  4. Step 4: Simplify right side
    53,716.80x = 3,276,445,785.98
  5. Step 5: Solve for x
    x = 3,276,445,785.98/53,716.80
  6. Step 6: Final answer
    x = 60,994.81

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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.