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Finding the Fourth Proportional to 61,410.60, 92,115.90 and 21,970.80

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Solution

The fourth proportional to 61,410.60, 92,115.90 and 21,970.80 is: 32,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,410.60 : 92,115.90 = 21,970.80 : x
  2. Step 2: Convert to fraction form
    61,410.60/92,115.90 = 21,970.80/x
  3. Step 3: Cross multiply
    61,410.60x = 92,115.90 × 21,970.80
  4. Step 4: Simplify right side
    61,410.60x = 2,023,860,015.72
  5. Step 5: Solve for x
    x = 2,023,860,015.72/61,410.60
  6. Step 6: Final answer
    x = 32,956.20

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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.