Home / 287,620.11-431,430.17-87,940.50

Finding the Fourth Proportional to 287,620.11, 431,430.17 and 87,940.50

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Solution

The fourth proportional to 287,620.11, 431,430.17 and 87,940.50 is: 131,910.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,620.11 : 431,430.17 = 87,940.50 : x
  2. Step 2: Convert to fraction form
    287,620.11/431,430.17 = 87,940.50/x
  3. Step 3: Cross multiply
    287,620.11x = 431,430.17 × 87,940.50
  4. Step 4: Simplify right side
    287,620.11x = 37,940,184,425.18
  5. Step 5: Solve for x
    x = 37,940,184,425.18/287,620.11
  6. Step 6: Final answer
    x = 131,910.75

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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.