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Finding the Fourth Proportional to 87,406.56, 131,079.60 and 54,075.60

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Solution

The fourth proportional to 87,406.56, 131,079.60 and 54,075.60 is: 81,094.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,406.56 : 131,079.60 = 54,075.60 : x
  2. Step 2: Convert to fraction form
    87,406.56/131,079.60 = 54,075.60/x
  3. Step 3: Cross multiply
    87,406.56x = 131,079.60 × 54,075.60
  4. Step 4: Simplify right side
    87,406.56x = 7,088,208,017.76
  5. Step 5: Solve for x
    x = 7,088,208,017.76/87,406.56
  6. Step 6: Final answer
    x = 81,094.69

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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.