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Finding the Fourth Proportional to 61,405.60, 92,108.40 and 31,813.60

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Solution

The fourth proportional to 61,405.60, 92,108.40 and 31,813.60 is: 47,720.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,405.60 : 92,108.40 = 31,813.60 : x
  2. Step 2: Convert to fraction form
    61,405.60/92,108.40 = 31,813.60/x
  3. Step 3: Cross multiply
    61,405.60x = 92,108.40 × 31,813.60
  4. Step 4: Simplify right side
    61,405.60x = 2,930,299,794.24
  5. Step 5: Solve for x
    x = 2,930,299,794.24/61,405.60
  6. Step 6: Final answer
    x = 47,720.40

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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.