Home / 115,405.45-172,652.67-87,406.18

Finding the Fourth Proportional to 115,405.45, 172,652.67 and 87,406.18

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Solution

The fourth proportional to 115,405.45, 172,652.67 and 87,406.18 is: 130,764.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,405.45 : 172,652.67 = 87,406.18 : x
  2. Step 2: Convert to fraction form
    115,405.45/172,652.67 = 87,406.18/x
  3. Step 3: Cross multiply
    115,405.45x = 172,652.67 × 87,406.18
  4. Step 4: Simplify right side
    115,405.45x = 15,090,910,351.50
  5. Step 5: Solve for x
    x = 15,090,910,351.50/115,405.45
  6. Step 6: Final answer
    x = 130,764.28

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1.5x scale

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.