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Finding the Fourth Proportional to 58,118.88, 87,170 and 18,670.80

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Solution

The fourth proportional to 58,118.88, 87,170 and 18,670.80 is: 28,003.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,118.88 : 87,170 = 18,670.80 : x
  2. Step 2: Convert to fraction form
    58,118.88/87,170 = 18,670.80/x
  3. Step 3: Cross multiply
    58,118.88x = 87,170 × 18,670.80
  4. Step 4: Simplify right side
    58,118.88x = 1,627,533,636
  5. Step 5: Solve for x
    x = 1,627,533,636/58,118.88
  6. Step 6: Final answer
    x = 28,003.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.