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Finding the Fourth Proportional to 87,881.76, 131,792.40 and 28,702.76

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Solution

The fourth proportional to 87,881.76, 131,792.40 and 28,702.76 is: 43,044.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,881.76 : 131,792.40 = 28,702.76 : x
  2. Step 2: Convert to fraction form
    87,881.76/131,792.40 = 28,702.76/x
  3. Step 3: Cross multiply
    87,881.76x = 131,792.40 × 28,702.76
  4. Step 4: Simplify right side
    87,881.76x = 3,782,804,968.06
  5. Step 5: Solve for x
    x = 3,782,804,968.06/87,881.76
  6. Step 6: Final answer
    x = 43,044.26

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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.