Home / 115,128.31-172,632.32-36,221.35

Finding the Fourth Proportional to 115,128.31, 172,632.32 and 36,221.35

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Solution

The fourth proportional to 115,128.31, 172,632.32 and 36,221.35 is: 54,313.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,128.31 : 172,632.32 = 36,221.35 : x
  2. Step 2: Convert to fraction form
    115,128.31/172,632.32 = 36,221.35/x
  3. Step 3: Cross multiply
    115,128.31x = 172,632.32 × 36,221.35
  4. Step 4: Simplify right side
    115,128.31x = 6,252,975,207.17
  5. Step 5: Solve for x
    x = 6,252,975,207.17/115,128.31
  6. Step 6: Final answer
    x = 54,313.10

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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.