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Finding the Fourth Proportional to 169,322.09, 253,996.95 and 85,038.90

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Solution

The fourth proportional to 169,322.09, 253,996.95 and 85,038.90 is: 127,565.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,322.09 : 253,996.95 = 85,038.90 : x
  2. Step 2: Convert to fraction form
    169,322.09/253,996.95 = 85,038.90/x
  3. Step 3: Cross multiply
    169,322.09x = 253,996.95 × 85,038.90
  4. Step 4: Simplify right side
    169,322.09x = 21,599,621,231.36
  5. Step 5: Solve for x
    x = 21,599,621,231.36/169,322.09
  6. Step 6: Final answer
    x = 127,565.29

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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.