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Finding the Fourth Proportional to 169,603.79, 254,411.08 and 85,317.89

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Solution

The fourth proportional to 169,603.79, 254,411.08 and 85,317.89 is: 127,979.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,603.79 : 254,411.08 = 85,317.89 : x
  2. Step 2: Convert to fraction form
    169,603.79/254,411.08 = 85,317.89/x
  3. Step 3: Cross multiply
    169,603.79x = 254,411.08 × 85,317.89
  4. Step 4: Simplify right side
    169,603.79x = 21,705,815,052.87
  5. Step 5: Solve for x
    x = 21,705,815,052.87/169,603.79
  6. Step 6: Final answer
    x = 127,979.54

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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.