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Finding the Fourth Proportional to 61,518.78, 92,270.88 and 19,965.78

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Solution

The fourth proportional to 61,518.78, 92,270.88 and 19,965.78 is: 29,946.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,518.78 : 92,270.88 = 19,965.78 : x
  2. Step 2: Convert to fraction form
    61,518.78/92,270.88 = 19,965.78/x
  3. Step 3: Cross multiply
    61,518.78x = 92,270.88 × 19,965.78
  4. Step 4: Simplify right side
    61,518.78x = 1,842,260,090.49
  5. Step 5: Solve for x
    x = 1,842,260,090.49/61,518.78
  6. Step 6: Final answer
    x = 29,946.30

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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.