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Finding the Fourth Proportional to 287,403.04, 431,104.64 and 87,724.56

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Solution

The fourth proportional to 287,403.04, 431,104.64 and 87,724.56 is: 131,586.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,403.04 : 431,104.64 = 87,724.56 : x
  2. Step 2: Convert to fraction form
    287,403.04/431,104.64 = 87,724.56/x
  3. Step 3: Cross multiply
    287,403.04x = 431,104.64 × 87,724.56
  4. Step 4: Simplify right side
    287,403.04x = 37,818,464,857.96
  5. Step 5: Solve for x
    x = 37,818,464,857.96/287,403.04
  6. Step 6: Final answer
    x = 131,586.86

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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.