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Finding the Fourth Proportional to 87,014, 130,505.34 and 39,617.80

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Solution

The fourth proportional to 87,014, 130,505.34 and 39,617.80 is: 59,419.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,014 : 130,505.34 = 39,617.80 : x
  2. Step 2: Convert to fraction form
    87,014/130,505.34 = 39,617.80/x
  3. Step 3: Cross multiply
    87,014x = 130,505.34 × 39,617.80
  4. Step 4: Simplify right side
    87,014x = 5,170,334,459.05
  5. Step 5: Solve for x
    x = 5,170,334,459.05/87,014
  6. Step 6: Final answer
    x = 59,419.57

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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.