Home / 87,943.72-121,389.89-56,112.56

Finding the Fourth Proportional to 87,943.72, 121,389.89 and 56,112.56

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Solution

The fourth proportional to 87,943.72, 121,389.89 and 56,112.56 is: 77,452.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,943.72 : 121,389.89 = 56,112.56 : x
  2. Step 2: Convert to fraction form
    87,943.72/121,389.89 = 56,112.56/x
  3. Step 3: Cross multiply
    87,943.72x = 121,389.89 × 56,112.56
  4. Step 4: Simplify right side
    87,943.72x = 6,811,497,486.02
  5. Step 5: Solve for x
    x = 6,811,497,486.02/87,943.72
  6. Step 6: Final answer
    x = 77,452.92

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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.