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Finding the Fourth Proportional to 153,469.92, 211,739.76 and 86,388.96

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Solution

The fourth proportional to 153,469.92, 211,739.76 and 86,388.96 is: 119,189.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,469.92 : 211,739.76 = 86,388.96 : x
  2. Step 2: Convert to fraction form
    153,469.92/211,739.76 = 86,388.96/x
  3. Step 3: Cross multiply
    153,469.92x = 211,739.76 × 86,388.96
  4. Step 4: Simplify right side
    153,469.92x = 18,291,977,657.05
  5. Step 5: Solve for x
    x = 18,291,977,657.05/153,469.92
  6. Step 6: Final answer
    x = 119,189.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.