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Finding the Fourth Proportional to 287,155.73, 430,795.87 and 87,470.89

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Solution

The fourth proportional to 287,155.73, 430,795.87 and 87,470.89 is: 131,225.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,155.73 : 430,795.87 = 87,470.89 : x
  2. Step 2: Convert to fraction form
    287,155.73/430,795.87 = 87,470.89/x
  3. Step 3: Cross multiply
    287,155.73x = 430,795.87 × 87,470.89
  4. Step 4: Simplify right side
    287,155.73x = 37,682,096,861.56
  5. Step 5: Solve for x
    x = 37,682,096,861.56/287,155.73
  6. Step 6: Final answer
    x = 131,225.30

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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.