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Finding the Fourth Proportional to 61,788.72, 92,611.46 and 28,438.76

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Solution

The fourth proportional to 61,788.72, 92,611.46 and 28,438.76 is: 42,625.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,788.72 : 92,611.46 = 28,438.76 : x
  2. Step 2: Convert to fraction form
    61,788.72/92,611.46 = 28,438.76/x
  3. Step 3: Cross multiply
    61,788.72x = 92,611.46 × 28,438.76
  4. Step 4: Simplify right side
    61,788.72x = 2,633,755,084.19
  5. Step 5: Solve for x
    x = 2,633,755,084.19/61,788.72
  6. Step 6: Final answer
    x = 42,625.18

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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.