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Finding the Fourth Proportional to 61,689.60, 92,577.60 and 39,556.80

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Solution

The fourth proportional to 61,689.60, 92,577.60 and 39,556.80 is: 59,362.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,689.60 : 92,577.60 = 39,556.80 : x
  2. Step 2: Convert to fraction form
    61,689.60/92,577.60 = 39,556.80/x
  3. Step 3: Cross multiply
    61,689.60x = 92,577.60 × 39,556.80
  4. Step 4: Simplify right side
    61,689.60x = 3,662,073,607.68
  5. Step 5: Solve for x
    x = 3,662,073,607.68/61,689.60
  6. Step 6: Final answer
    x = 59,362.90

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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.