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Finding the Fourth Proportional to 286,036.20, 428,859.90 and 108,516.60

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Solution

The fourth proportional to 286,036.20, 428,859.90 and 108,516.60 is: 162,701.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,036.20 : 428,859.90 = 108,516.60 : x
  2. Step 2: Convert to fraction form
    286,036.20/428,859.90 = 108,516.60/x
  3. Step 3: Cross multiply
    286,036.20x = 428,859.90 × 108,516.60
  4. Step 4: Simplify right side
    286,036.20x = 46,538,418,224.34
  5. Step 5: Solve for x
    x = 46,538,418,224.34/286,036.20
  6. Step 6: Final answer
    x = 162,701.15

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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.