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Finding the Fourth Proportional to 287,620.02, 431,430.03 and 87,940.41

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Solution

The fourth proportional to 287,620.02, 431,430.03 and 87,940.41 is: 131,910.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,620.02 : 431,430.03 = 87,940.41 : x
  2. Step 2: Convert to fraction form
    287,620.02/431,430.03 = 87,940.41/x
  3. Step 3: Cross multiply
    287,620.02x = 431,430.03 × 87,940.41
  4. Step 4: Simplify right side
    287,620.02x = 37,940,133,724.51
  5. Step 5: Solve for x
    x = 37,940,133,724.51/287,620.02
  6. Step 6: Final answer
    x = 131,910.62

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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.