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Finding the Fourth Proportional to 115,216.20, 172,832.40 and 65,320.20

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Solution

The fourth proportional to 115,216.20, 172,832.40 and 65,320.20 is: 97,984.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,216.20 : 172,832.40 = 65,320.20 : x
  2. Step 2: Convert to fraction form
    115,216.20/172,832.40 = 65,320.20/x
  3. Step 3: Cross multiply
    115,216.20x = 172,832.40 × 65,320.20
  4. Step 4: Simplify right side
    115,216.20x = 11,289,446,934.48
  5. Step 5: Solve for x
    x = 11,289,446,934.48/115,216.20
  6. Step 6: Final answer
    x = 97,984.89

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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.