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Finding the Fourth Proportional to 86,704.80, 130,024.80 and 60,331.20

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Solution

The fourth proportional to 86,704.80, 130,024.80 and 60,331.20 is: 90,474.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,704.80 : 130,024.80 = 60,331.20 : x
  2. Step 2: Convert to fraction form
    86,704.80/130,024.80 = 60,331.20/x
  3. Step 3: Cross multiply
    86,704.80x = 130,024.80 × 60,331.20
  4. Step 4: Simplify right side
    86,704.80x = 7,844,552,213.76
  5. Step 5: Solve for x
    x = 7,844,552,213.76/86,704.80
  6. Step 6: Final answer
    x = 90,474.26

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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.