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Finding the Fourth Proportional to 286,772.40, 430,207.20 and 87,091.20

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Solution

The fourth proportional to 286,772.40, 430,207.20 and 87,091.20 is: 130,651.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,772.40 : 430,207.20 = 87,091.20 : x
  2. Step 2: Convert to fraction form
    286,772.40/430,207.20 = 87,091.20/x
  3. Step 3: Cross multiply
    286,772.40x = 430,207.20 × 87,091.20
  4. Step 4: Simplify right side
    286,772.40x = 37,467,261,296.64
  5. Step 5: Solve for x
    x = 37,467,261,296.64/286,772.40
  6. Step 6: Final answer
    x = 130,651.56

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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.