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Finding the Fourth Proportional to 169,239.73, 253,859.60 and 86,192.05

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Solution

The fourth proportional to 169,239.73, 253,859.60 and 86,192.05 is: 129,288.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,239.73 : 253,859.60 = 86,192.05 : x
  2. Step 2: Convert to fraction form
    169,239.73/253,859.60 = 86,192.05/x
  3. Step 3: Cross multiply
    169,239.73x = 253,859.60 × 86,192.05
  4. Step 4: Simplify right side
    169,239.73x = 21,880,679,336.18
  5. Step 5: Solve for x
    x = 21,880,679,336.18/169,239.73
  6. Step 6: Final answer
    x = 129,288.08

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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.