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Finding the Fourth Proportional to 89,868.80, 134,803.20 and 87,924.80

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Solution

The fourth proportional to 89,868.80, 134,803.20 and 87,924.80 is: 131,887.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,868.80 : 134,803.20 = 87,924.80 : x
  2. Step 2: Convert to fraction form
    89,868.80/134,803.20 = 87,924.80/x
  3. Step 3: Cross multiply
    89,868.80x = 134,803.20 × 87,924.80
  4. Step 4: Simplify right side
    89,868.80x = 11,852,544,399.36
  5. Step 5: Solve for x
    x = 11,852,544,399.36/89,868.80
  6. Step 6: Final answer
    x = 131,887.20

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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.