Home / 87,487.34-120,700.95-57,289.88

Finding the Fourth Proportional to 87,487.34, 120,700.95 and 57,289.88

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Solution

The fourth proportional to 87,487.34, 120,700.95 and 57,289.88 is: 79,039.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,487.34 : 120,700.95 = 57,289.88 : x
  2. Step 2: Convert to fraction form
    87,487.34/120,700.95 = 57,289.88/x
  3. Step 3: Cross multiply
    87,487.34x = 120,700.95 × 57,289.88
  4. Step 4: Simplify right side
    87,487.34x = 6,914,942,941.39
  5. Step 5: Solve for x
    x = 6,914,942,941.39/87,487.34
  6. Step 6: Final answer
    x = 79,039.36

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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.