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Finding the Fourth Proportional to 61,429.60, 92,144.40 and 21,989.80

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Solution

The fourth proportional to 61,429.60, 92,144.40 and 21,989.80 is: 32,984.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,429.60 : 92,144.40 = 21,989.80 : x
  2. Step 2: Convert to fraction form
    61,429.60/92,144.40 = 21,989.80/x
  3. Step 3: Cross multiply
    61,429.60x = 92,144.40 × 21,989.80
  4. Step 4: Simplify right side
    61,429.60x = 2,026,236,927.12
  5. Step 5: Solve for x
    x = 2,026,236,927.12/61,429.60
  6. Step 6: Final answer
    x = 32,984.70

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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.