Home / 87,430.86-120,704.34-57,709.26

Finding the Fourth Proportional to 87,430.86, 120,704.34 and 57,709.26

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Solution

The fourth proportional to 87,430.86, 120,704.34 and 57,709.26 is: 79,671.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,430.86 : 120,704.34 = 57,709.26 : x
  2. Step 2: Convert to fraction form
    87,430.86/120,704.34 = 57,709.26/x
  3. Step 3: Cross multiply
    87,430.86x = 120,704.34 × 57,709.26
  4. Step 4: Simplify right side
    87,430.86x = 6,965,758,140.19
  5. Step 5: Solve for x
    x = 6,965,758,140.19/87,430.86
  6. Step 6: Final answer
    x = 79,671.62

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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.