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Finding the Fourth Proportional to 87,383.50, 120,602.16 and 53,411.56

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Solution

The fourth proportional to 87,383.50, 120,602.16 and 53,411.56 is: 73,715.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,383.50 : 120,602.16 = 53,411.56 : x
  2. Step 2: Convert to fraction form
    87,383.50/120,602.16 = 53,411.56/x
  3. Step 3: Cross multiply
    87,383.50x = 120,602.16 × 53,411.56
  4. Step 4: Simplify right side
    87,383.50x = 6,441,549,504.97
  5. Step 5: Solve for x
    x = 6,441,549,504.97/87,383.50
  6. Step 6: Final answer
    x = 73,715.86

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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.