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Finding the Fourth Proportional to 87,547.60, 131,418.60 and 54,305.20

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Solution

The fourth proportional to 87,547.60, 131,418.60 and 54,305.20 is: 81,518.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,547.60 : 131,418.60 = 54,305.20 : x
  2. Step 2: Convert to fraction form
    87,547.60/131,418.60 = 54,305.20/x
  3. Step 3: Cross multiply
    87,547.60x = 131,418.60 × 54,305.20
  4. Step 4: Simplify right side
    87,547.60x = 7,136,713,356.72
  5. Step 5: Solve for x
    x = 7,136,713,356.72/87,547.60
  6. Step 6: Final answer
    x = 81,518.09

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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.