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Finding the Fourth Proportional to 153,593.60, 211,976.34 and 85,616.78

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Solution

The fourth proportional to 153,593.60, 211,976.34 and 85,616.78 is: 118,160.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,593.60 : 211,976.34 = 85,616.78 : x
  2. Step 2: Convert to fraction form
    153,593.60/211,976.34 = 85,616.78/x
  3. Step 3: Cross multiply
    153,593.60x = 211,976.34 × 85,616.78
  4. Step 4: Simplify right side
    153,593.60x = 18,148,731,666.99
  5. Step 5: Solve for x
    x = 18,148,731,666.99/153,593.60
  6. Step 6: Final answer
    x = 118,160.73

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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.