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Finding the Fourth Proportional to 286,612.02, 429,922.28 and 109,128.87

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Solution

The fourth proportional to 286,612.02, 429,922.28 and 109,128.87 is: 163,694.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,612.02 : 429,922.28 = 109,128.87 : x
  2. Step 2: Convert to fraction form
    286,612.02/429,922.28 = 109,128.87/x
  3. Step 3: Cross multiply
    286,612.02x = 429,922.28 × 109,128.87
  4. Step 4: Simplify right side
    286,612.02x = 46,916,932,877.05
  5. Step 5: Solve for x
    x = 46,916,932,877.05/286,612.02
  6. Step 6: Final answer
    x = 163,694.92

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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.