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Finding the Fourth Proportional to 87,013, 130,503.84 and 39,616.80

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Solution

The fourth proportional to 87,013, 130,503.84 and 39,616.80 is: 59,418.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,013 : 130,503.84 = 39,616.80 : x
  2. Step 2: Convert to fraction form
    87,013/130,503.84 = 39,616.80/x
  3. Step 3: Cross multiply
    87,013x = 130,503.84 × 39,616.80
  4. Step 4: Simplify right side
    87,013x = 5,170,144,528.51
  5. Step 5: Solve for x
    x = 5,170,144,528.51/87,013
  6. Step 6: Final answer
    x = 59,418.07

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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.