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Finding the Fourth Proportional to 61,123.68, 91,692 and 21,684.24

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Solution

The fourth proportional to 61,123.68, 91,692 and 21,684.24 is: 32,528.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,123.68 : 91,692 = 21,684.24 : x
  2. Step 2: Convert to fraction form
    61,123.68/91,692 = 21,684.24/x
  3. Step 3: Cross multiply
    61,123.68x = 91,692 × 21,684.24
  4. Step 4: Simplify right side
    61,123.68x = 1,988,271,334.08
  5. Step 5: Solve for x
    x = 1,988,271,334.08/61,123.68
  6. Step 6: Final answer
    x = 32,528.66

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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.