Home / 87,125.04-120,396-71,203.68

Finding the Fourth Proportional to 87,125.04, 120,396 and 71,203.68

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Solution

The fourth proportional to 87,125.04, 120,396 and 71,203.68 is: 98,394.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,125.04 : 120,396 = 71,203.68 : x
  2. Step 2: Convert to fraction form
    87,125.04/120,396 = 71,203.68/x
  3. Step 3: Cross multiply
    87,125.04x = 120,396 × 71,203.68
  4. Step 4: Simplify right side
    87,125.04x = 8,572,638,257.28
  5. Step 5: Solve for x
    x = 8,572,638,257.28/87,125.04
  6. Step 6: Final answer
    x = 98,394.66

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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.