Home / 87,172.96-130,746.48-31,756

Finding the Fourth Proportional to 87,172.96, 130,746.48 and 31,756

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Solution

The fourth proportional to 87,172.96, 130,746.48 and 31,756 is: 47,629.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,172.96 : 130,746.48 = 31,756 : x
  2. Step 2: Convert to fraction form
    87,172.96/130,746.48 = 31,756/x
  3. Step 3: Cross multiply
    87,172.96x = 130,746.48 × 31,756
  4. Step 4: Simplify right side
    87,172.96x = 4,151,985,218.88
  5. Step 5: Solve for x
    x = 4,151,985,218.88/87,172.96
  6. Step 6: Final answer
    x = 47,629.28

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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.