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Finding the Fourth Proportional to 60,564.48, 90,858.87 and 21,111

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Solution

The fourth proportional to 60,564.48, 90,858.87 and 21,111 is: 31,670.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,564.48 : 90,858.87 = 21,111 : x
  2. Step 2: Convert to fraction form
    60,564.48/90,858.87 = 21,111/x
  3. Step 3: Cross multiply
    60,564.48x = 90,858.87 × 21,111
  4. Step 4: Simplify right side
    60,564.48x = 1,918,121,604.57
  5. Step 5: Solve for x
    x = 1,918,121,604.57/60,564.48
  6. Step 6: Final answer
    x = 31,670.74

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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.