Home / 87,185.72-120,285.32-56,988.45

Finding the Fourth Proportional to 87,185.72, 120,285.32 and 56,988.45

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Solution

The fourth proportional to 87,185.72, 120,285.32 and 56,988.45 is: 78,623.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,185.72 : 120,285.32 = 56,988.45 : x
  2. Step 2: Convert to fraction form
    87,185.72/120,285.32 = 56,988.45/x
  3. Step 3: Cross multiply
    87,185.72x = 120,285.32 × 56,988.45
  4. Step 4: Simplify right side
    87,185.72x = 6,854,873,659.61
  5. Step 5: Solve for x
    x = 6,854,873,659.61/87,185.72
  6. Step 6: Final answer
    x = 78,623.82

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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.