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Finding the Fourth Proportional to 60,476.88, 90,724.28 and 18,918.48

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Solution

The fourth proportional to 60,476.88, 90,724.28 and 18,918.48 is: 28,380.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,476.88 : 90,724.28 = 18,918.48 : x
  2. Step 2: Convert to fraction form
    60,476.88/90,724.28 = 18,918.48/x
  3. Step 3: Cross multiply
    60,476.88x = 90,724.28 × 18,918.48
  4. Step 4: Simplify right side
    60,476.88x = 1,716,365,476.69
  5. Step 5: Solve for x
    x = 1,716,365,476.69/60,476.88
  6. Step 6: Final answer
    x = 28,380.52

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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.