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Finding the Fourth Proportional to 87,759.84, 121,100.40 and 53,752.80

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Solution

The fourth proportional to 87,759.84, 121,100.40 and 53,752.80 is: 74,173.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,759.84 : 121,100.40 = 53,752.80 : x
  2. Step 2: Convert to fraction form
    87,759.84/121,100.40 = 53,752.80/x
  3. Step 3: Cross multiply
    87,759.84x = 121,100.40 × 53,752.80
  4. Step 4: Simplify right side
    87,759.84x = 6,509,485,581.12
  5. Step 5: Solve for x
    x = 6,509,485,581.12/87,759.84
  6. Step 6: Final answer
    x = 74,173.85

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1.5x scale

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.