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Finding the Fourth Proportional to 287,652.61, 431,409.72 and 87,974.73

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Solution

The fourth proportional to 287,652.61, 431,409.72 and 87,974.73 is: 131,940.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,652.61 : 431,409.72 = 87,974.73 : x
  2. Step 2: Convert to fraction form
    287,652.61/431,409.72 = 87,974.73/x
  3. Step 3: Cross multiply
    287,652.61x = 431,409.72 × 87,974.73
  4. Step 4: Simplify right side
    287,652.61x = 37,953,152,117.98
  5. Step 5: Solve for x
    x = 37,953,152,117.98/287,652.61
  6. Step 6: Final answer
    x = 131,940.93

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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.