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Finding the Fourth Proportional to 287,603.62, 431,403.60 and 87,923.23

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Solution

The fourth proportional to 287,603.62, 431,403.60 and 87,923.23 is: 131,884.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,603.62 : 431,403.60 = 87,923.23 : x
  2. Step 2: Convert to fraction form
    287,603.62/431,403.60 = 87,923.23/x
  3. Step 3: Cross multiply
    287,603.62x = 431,403.60 × 87,923.23
  4. Step 4: Simplify right side
    287,603.62x = 37,930,397,945.63
  5. Step 5: Solve for x
    x = 37,930,397,945.63/287,603.62
  6. Step 6: Final answer
    x = 131,884.29

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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.