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Finding the Fourth Proportional to 87,113.80, 121,803.80 and 87,113.80

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Solution

The fourth proportional to 87,113.80, 121,803.80 and 87,113.80 is: 121,803.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,113.80 : 121,803.80 = 87,113.80 : x
  2. Step 2: Convert to fraction form
    87,113.80/121,803.80 = 87,113.80/x
  3. Step 3: Cross multiply
    87,113.80x = 121,803.80 × 87,113.80
  4. Step 4: Simplify right side
    87,113.80x = 10,610,791,872.44
  5. Step 5: Solve for x
    x = 10,610,791,872.44/87,113.80
  6. Step 6: Final answer
    x = 121,803.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.