Home / 87,430.10-120,703.30-57,708.50

Finding the Fourth Proportional to 87,430.10, 120,703.30 and 57,708.50

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Solution

The fourth proportional to 87,430.10, 120,703.30 and 57,708.50 is: 79,670.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,430.10 : 120,703.30 = 57,708.50 : x
  2. Step 2: Convert to fraction form
    87,430.10/120,703.30 = 57,708.50/x
  3. Step 3: Cross multiply
    87,430.10x = 120,703.30 × 57,708.50
  4. Step 4: Simplify right side
    87,430.10x = 6,965,605,640.26
  5. Step 5: Solve for x
    x = 6,965,605,640.26/87,430.10
  6. Step 6: Final answer
    x = 79,670.57

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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.