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Finding the Fourth Proportional to 151,958.40, 209,702.40 and 84,890.40

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Solution

The fourth proportional to 151,958.40, 209,702.40 and 84,890.40 is: 117,148.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,958.40 : 209,702.40 = 84,890.40 : x
  2. Step 2: Convert to fraction form
    151,958.40/209,702.40 = 84,890.40/x
  3. Step 3: Cross multiply
    151,958.40x = 209,702.40 × 84,890.40
  4. Step 4: Simplify right side
    151,958.40x = 17,801,720,616.96
  5. Step 5: Solve for x
    x = 17,801,720,616.96/151,958.40
  6. Step 6: Final answer
    x = 117,148.64

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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.