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Finding the Fourth Proportional to 199,990.64, 299,985.98 and 80,102.04

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Solution

The fourth proportional to 199,990.64, 299,985.98 and 80,102.04 is: 120,153.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,990.64 : 299,985.98 = 80,102.04 : x
  2. Step 2: Convert to fraction form
    199,990.64/299,985.98 = 80,102.04/x
  3. Step 3: Cross multiply
    199,990.64x = 299,985.98 × 80,102.04
  4. Step 4: Simplify right side
    199,990.64x = 24,029,488,969.40
  5. Step 5: Solve for x
    x = 24,029,488,969.40/199,990.64
  6. Step 6: Final answer
    x = 120,153.07

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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.