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Finding the Fourth Proportional to 89,218.80, 132,808.86 and 87,889.68

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Solution

The fourth proportional to 89,218.80, 132,808.86 and 87,889.68 is: 130,830.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,218.80 : 132,808.86 = 87,889.68 : x
  2. Step 2: Convert to fraction form
    89,218.80/132,808.86 = 87,889.68/x
  3. Step 3: Cross multiply
    89,218.80x = 132,808.86 × 87,889.68
  4. Step 4: Simplify right side
    89,218.80x = 11,672,528,206.56
  5. Step 5: Solve for x
    x = 11,672,528,206.56/89,218.80
  6. Step 6: Final answer
    x = 130,830.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.