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Finding the Fourth Proportional to 269,080.86, 403,423.64 and 128,937.90

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Solution

The fourth proportional to 269,080.86, 403,423.64 and 128,937.90 is: 193,312.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,080.86 : 403,423.64 = 128,937.90 : x
  2. Step 2: Convert to fraction form
    269,080.86/403,423.64 = 128,937.90/x
  3. Step 3: Cross multiply
    269,080.86x = 403,423.64 × 128,937.90
  4. Step 4: Simplify right side
    269,080.86x = 52,016,594,934.84
  5. Step 5: Solve for x
    x = 52,016,594,934.84/269,080.86
  6. Step 6: Final answer
    x = 193,312.14

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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.