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Finding the Fourth Proportional to 157,555.61, 236,212.25 and 81,572.70

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Solution

The fourth proportional to 157,555.61, 236,212.25 and 81,572.70 is: 122,296.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,555.61 : 236,212.25 = 81,572.70 : x
  2. Step 2: Convert to fraction form
    157,555.61/236,212.25 = 81,572.70/x
  3. Step 3: Cross multiply
    157,555.61x = 236,212.25 × 81,572.70
  4. Step 4: Simplify right side
    157,555.61x = 19,268,469,949.31
  5. Step 5: Solve for x
    x = 19,268,469,949.31/157,555.61
  6. Step 6: Final answer
    x = 122,296.31

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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.