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Finding the Fourth Proportional to 123,611.20, 185,416.80 and 61,403.20

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Solution

The fourth proportional to 123,611.20, 185,416.80 and 61,403.20 is: 92,104.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,611.20 : 185,416.80 = 61,403.20 : x
  2. Step 2: Convert to fraction form
    123,611.20/185,416.80 = 61,403.20/x
  3. Step 3: Cross multiply
    123,611.20x = 185,416.80 × 61,403.20
  4. Step 4: Simplify right side
    123,611.20x = 11,385,184,853.76
  5. Step 5: Solve for x
    x = 11,385,184,853.76/123,611.20
  6. Step 6: Final answer
    x = 92,104.80

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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.