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Finding the Fourth Proportional to 286,137, 429,101.82 and 128,284.20

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Solution

The fourth proportional to 286,137, 429,101.82 and 128,284.20 is: 192,379.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,137 : 429,101.82 = 128,284.20 : x
  2. Step 2: Convert to fraction form
    286,137/429,101.82 = 128,284.20/x
  3. Step 3: Cross multiply
    286,137x = 429,101.82 × 128,284.20
  4. Step 4: Simplify right side
    286,137x = 55,046,983,697.24
  5. Step 5: Solve for x
    x = 55,046,983,697.24/286,137
  6. Step 6: Final answer
    x = 192,379.82

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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.