Home / 87,905.86-121,309.58-47,620.40

Finding the Fourth Proportional to 87,905.86, 121,309.58 and 47,620.40

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Solution

The fourth proportional to 87,905.86, 121,309.58 and 47,620.40 is: 65,715.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,905.86 : 121,309.58 = 47,620.40 : x
  2. Step 2: Convert to fraction form
    87,905.86/121,309.58 = 47,620.40/x
  3. Step 3: Cross multiply
    87,905.86x = 121,309.58 × 47,620.40
  4. Step 4: Simplify right side
    87,905.86x = 5,776,810,235.94
  5. Step 5: Solve for x
    x = 5,776,810,235.94/87,905.86
  6. Step 6: Final answer
    x = 65,715.87

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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.