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Finding the Fourth Proportional to 287,351.82, 431,027.84 and 118,686.79

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Solution

The fourth proportional to 287,351.82, 431,027.84 and 118,686.79 is: 178,030.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,351.82 : 431,027.84 = 118,686.79 : x
  2. Step 2: Convert to fraction form
    287,351.82/431,027.84 = 118,686.79/x
  3. Step 3: Cross multiply
    287,351.82x = 431,027.84 × 118,686.79
  4. Step 4: Simplify right side
    287,351.82x = 51,157,309,949.38
  5. Step 5: Solve for x
    x = 51,157,309,949.38/287,351.82
  6. Step 6: Final answer
    x = 178,030.23

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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.