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Finding the Fourth Proportional to 61,420.80, 92,110.56 and 21,429.60

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Solution

The fourth proportional to 61,420.80, 92,110.56 and 21,429.60 is: 32,137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,420.80 : 92,110.56 = 21,429.60 : x
  2. Step 2: Convert to fraction form
    61,420.80/92,110.56 = 21,429.60/x
  3. Step 3: Cross multiply
    61,420.80x = 92,110.56 × 21,429.60
  4. Step 4: Simplify right side
    61,420.80x = 1,973,892,456.58
  5. Step 5: Solve for x
    x = 1,973,892,456.58/61,420.80
  6. Step 6: Final answer
    x = 32,137.20

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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.